74182681 has 4 divisors (see below), whose sum is σ = 74571264. Its totient is φ = 73794100.

The previous prime is 74182663. The next prime is 74182687. The reversal of 74182681 is 18628147.

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.

It is a cyclic number.

It is not a de Polignac number, because 74182681 - 2⁷ = 74182553 is a prime.

It is a super-2 number, since 2×74182681² = 11006140320695522, 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 74182681.

It is not an unprimeable number, because it can be changed into a prime (74182687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194005 + ... + 194386.

It is an arithmetic number, because the mean of its divisors is an integer number (18642816).

Almost surely, 2^74182681 is an apocalyptic number.

It is an amenable number.

74182681 is a deficient number, since it is larger than the sum of its proper divisors (388583).

74182681 is a wasteful number, since it uses less digits than its factorization.

74182681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388582.

The product of its digits is 21504, while the sum is 37.

The square root of 74182681 is about 8612.9368394294. The cubic root of 74182681 is about 420.1788372940.

The spelling of 74182681 in words is "seventy-four million, one hundred eighty-two thousand, six hundred eighty-one".