74208681 has 6 divisors (see below), whose sum is σ = 107190330. Its totient is φ = 49472448.

The previous prime is 74208677. The next prime is 74208691. The reversal of 74208681 is 18680247.

It can be written as a sum of positive squares in only one way, i.e., 41718681 + 32490000 = 6459^2 + 5700^2 .

It is not a de Polignac number, because 74208681 - 2² = 74208677 is a prime.

It is a super-2 number, since 2×74208681² = 11013856671519522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74208691) 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 5 ways as a sum of consecutive naturals, for example, 4122696 + ... + 4122713.

It is an arithmetic number, because the mean of its divisors is an integer number (17865055).

Almost surely, 2^74208681 is an apocalyptic number.

It is an amenable number.

74208681 is a deficient number, since it is larger than the sum of its proper divisors (32981649).

74208681 is a wasteful number, since it uses less digits than its factorization.

74208681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8245415 (or 8245412 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 74208681 is about 8614.4460646057. The cubic root of 74208681 is about 420.2279205102.

The spelling of 74208681 in words is "seventy-four million, two hundred eight thousand, six hundred eighty-one".