74512813 has 16 divisors (see below), whose sum is σ = 80720640. Its totient is φ = 68558400.

The previous prime is 74512807. The next prime is 74512817. The reversal of 74512813 is 31821547.

It is a cyclic number.

It is not a de Polignac number, because 74512813 - 2⁹ = 74512301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74512817) 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, 161403 + ... + 161863.

It is an arithmetic number, because the mean of its divisors is an integer number (5045040).

Almost surely, 2^74512813 is an apocalyptic number.

It is an amenable number.

74512813 is a deficient number, since it is larger than the sum of its proper divisors (6207827).

74512813 is a wasteful number, since it uses less digits than its factorization.

74512813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708.

The product of its digits is 6720, while the sum is 31.

The square root of 74512813 is about 8632.0804560662. The cubic root of 74512813 is about 420.8012162356.

The spelling of 74512813 in words is "seventy-four million, five hundred twelve thousand, eight hundred thirteen".