74531813 has 16 divisors (see below), whose sum is σ = 80619840. Its totient is φ = 68688000.

The previous prime is 74531797. The next prime is 74531861. The reversal of 74531813 is 31813547.

It is a cyclic number.

It is not a de Polignac number, because 74531813 - 2⁴ = 74531797 is a prime.

It is a super-2 number, since 2×74531813² = 11109982298133938, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 74531813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74531713) 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 15 ways as a sum of consecutive naturals, for example, 123713 + ... + 124313.

It is an arithmetic number, because the mean of its divisors is an integer number (5038740).

Almost surely, 2^74531813 is an apocalyptic number.

It is an amenable number.

74531813 is a deficient number, since it is larger than the sum of its proper divisors (6088027).

74531813 is a wasteful number, since it uses less digits than its factorization.

74531813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its digits is 10080, while the sum is 32.

The square root of 74531813 is about 8633.1809317308. The cubic root of 74531813 is about 420.8369798549.

The spelling of 74531813 in words is "seventy-four million, five hundred thirty-one thousand, eight hundred thirteen".