74831813 has 16 divisors (see below), whose sum is σ = 87526656. Its totient is φ = 62649600.

The previous prime is 74831791. The next prime is 74831839. The reversal of 74831813 is 31813847.

It is a cyclic number.

It is not a de Polignac number, because 74831813 - 2¹⁶ = 74766277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74831873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148520 + ... + 149022.

It is an arithmetic number, because the mean of its divisors is an integer number (5470416).

Almost surely, 2^74831813 is an apocalyptic number.

It is an amenable number.

74831813 is a deficient number, since it is larger than the sum of its proper divisors (12694843).

74831813 is a wasteful number, since it uses less digits than its factorization.

74831813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964.

The product of its digits is 16128, while the sum is 35.

The square root of 74831813 is about 8650.5383069495. The cubic root of 74831813 is about 421.4008647001.

The spelling of 74831813 in words is "seventy-four million, eight hundred thirty-one thousand, eight hundred thirteen".