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76133881 = 397191773
BaseRepresentation
bin1001000100110…
…11010111111001
312022021000001101
410202123113321
5123442241011
611315451401
71613061445
oct442332771
9168230041
1076133881
1139a8056a
12215b6b61
1312a08745
14a17b825
156a3d2c1
hex489b5f9

76133881 has 4 divisors (see below), whose sum is σ = 76326052. Its totient is φ = 75941712.

The previous prime is 76133867. The next prime is 76133929. The reversal of 76133881 is 18833167.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53523856 + 22610025 = 7316^2 + 4755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-76133881 is a prime.

It is a super-2 number, since 2×761338812 = 11592735672244322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76133881.

It is not an unprimeable number, because it can be changed into a prime (76133821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95490 + ... + 96283.

It is an arithmetic number, because the mean of its divisors is an integer number (19081513).

Almost surely, 276133881 is an apocalyptic number.

It is an amenable number.

76133881 is a deficient number, since it is larger than the sum of its proper divisors (192171).

76133881 is a wasteful number, since it uses less digits than its factorization.

76133881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192170.

The product of its digits is 24192, while the sum is 37.

The square root of 76133881 is about 8725.4731103820. The cubic root of 76133881 is about 423.8309389629.

The spelling of 76133881 in words is "seventy-six million, one hundred thirty-three thousand, eight hundred eighty-one".

Divisors: 1 397 191773 76133881