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76079681 = 83990679
BaseRepresentation
bin1001000100011…
…10001001000001
312022011020200222
410202032021001
5123434022211
611314352425
71612444436
oct442161101
9168136628
1076079681
1139a43877
122158b715
13129b9b82
14a165b8d
156a2c1db
hex488e241

76079681 has 4 divisors (see below), whose sum is σ = 76171200. Its totient is φ = 75988164.

The previous prime is 76079671. The next prime is 76079687. The reversal of 76079681 is 18697067.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18697067 = 127147221.

It is a cyclic number.

It is not a de Polignac number, because 76079681 - 26 = 76079617 is a prime.

It is a super-2 number, since 2×760796812 = 11576235722123522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76079687) 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, 44501 + ... + 46178.

It is an arithmetic number, because the mean of its divisors is an integer number (19042800).

Almost surely, 276079681 is an apocalyptic number.

It is an amenable number.

76079681 is a deficient number, since it is larger than the sum of its proper divisors (91519).

76079681 is an equidigital number, since it uses as much as digits as its factorization.

76079681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91518.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 76079681 is about 8722.3667086405. The cubic root of 76079681 is about 423.7303394666.

The spelling of 76079681 in words is "seventy-six million, seventy-nine thousand, six hundred eighty-one".

Divisors: 1 839 90679 76079681