74534813 has 4 divisors (see below), whose sum is σ = 74555520. Its totient is φ = 74514108.

The previous prime is 74534807. The next prime is 74534821. The reversal of 74534813 is 31843547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74534813 - 2⁴ = 74534797 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 (74534833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3395 + ... + 12672.

It is an arithmetic number, because the mean of its divisors is an integer number (18638880).

Almost surely, 2^74534813 is an apocalyptic number.

It is an amenable number.

74534813 is a deficient number, since it is larger than the sum of its proper divisors (20707).

74534813 is a wasteful number, since it uses less digits than its factorization.

74534813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20706.

The product of its digits is 40320, while the sum is 35.

The square root of 74534813 is about 8633.3546782233. The cubic root of 74534813 is about 420.8426261865.

The spelling of 74534813 in words is "seventy-four million, five hundred thirty-four thousand, eight hundred thirteen".