74792081 has 12 divisors (see below), whose sum is σ = 93696372. Its totient is φ = 59175648.

The previous prime is 74792071. The next prime is 74792099. The reversal of 74792081 is 18029747.

It can be written as a sum of positive squares in 2 ways, for example, as 38551681 + 36240400 = 6209^2 + 6020^2 .

It is a de Polignac number, because none of the positive numbers 2^k-74792081 is a prime.

It is a super-2 number, since 2×74792081² = 11187710760621122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74792041) 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 11 ways as a sum of consecutive naturals, for example, 58070 + ... + 59343.

It is an arithmetic number, because the mean of its divisors is an integer number (7808031).

Almost surely, 2^74792081 is an apocalyptic number.

It is an amenable number.

74792081 is a deficient number, since it is larger than the sum of its proper divisors (18904291).

74792081 is a wasteful number, since it uses less digits than its factorization.

74792081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117440 (or 117433 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 74792081 is about 8648.2414975531. The cubic root of 74792081 is about 421.3262704751.

The spelling of 74792081 in words is "seventy-four million, seven hundred ninety-two thousand, eighty-one".