74812649 has 4 divisors (see below), whose sum is σ = 76080720. Its totient is φ = 73544580.

The previous prime is 74812601. The next prime is 74812651. The reversal of 74812649 is 94621847.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94621847 = 17 ⋅5565991.

It is a cyclic number.

It is not a de Polignac number, because 74812649 - 2²⁰ = 73764073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74812679) 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, 633947 + ... + 634064.

It is an arithmetic number, because the mean of its divisors is an integer number (19020180).

Almost surely, 2^74812649 is an apocalyptic number.

It is an amenable number.

74812649 is a deficient number, since it is larger than the sum of its proper divisors (1268071).

74812649 is a wasteful number, since it uses less digits than its factorization.

74812649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268070.

The product of its digits is 96768, while the sum is 41.

The square root of 74812649 is about 8649.4305592912. The cubic root of 74812649 is about 421.3648888438.

The spelling of 74812649 in words is "seventy-four million, eight hundred twelve thousand, six hundred forty-nine".