74674639 has 4 divisors (see below), whose sum is σ = 80418856. Its totient is φ = 68930424.

The previous prime is 74674619. The next prime is 74674643. The reversal of 74674639 is 93647647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93647647 = 2347 ⋅39901.

It is a cyclic number.

It is not a de Polignac number, because 74674639 - 2⁷ = 74674511 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 (74674609) 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, 2872089 + ... + 2872114.

It is an arithmetic number, because the mean of its divisors is an integer number (20104714).

Almost surely, 2^74674639 is an apocalyptic number.

74674639 is a deficient number, since it is larger than the sum of its proper divisors (5744217).

74674639 is a wasteful number, since it uses less digits than its factorization.

74674639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744216.

The product of its digits is 762048, while the sum is 46.

The square root of 74674639 is about 8641.4488947167. The cubic root of 74674639 is about 421.1056262521.

The spelling of 74674639 in words is "seventy-four million, six hundred seventy-four thousand, six hundred thirty-nine".