74739477 has 4 divisors (see below), whose sum is σ = 99652640. Its totient is φ = 49826316.

The previous prime is 74739473. The next prime is 74739479. The reversal of 74739477 is 77493747.

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: 77493747 = 3 ⋅25831249.

It is not a de Polignac number, because 74739477 - 2² = 74739473 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 (74739473) 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, 12456577 + ... + 12456582.

It is an arithmetic number, because the mean of its divisors is an integer number (24913160).

Almost surely, 2^74739477 is an apocalyptic number.

It is an amenable number.

74739477 is a deficient number, since it is larger than the sum of its proper divisors (24913163).

74739477 is a wasteful number, since it uses less digits than its factorization.

74739477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24913162.

The product of its digits is 1037232, while the sum is 48.

The square root of 74739477 is about 8645.1996506732. The cubic root of 74739477 is about 421.2274692608.

The spelling of 74739477 in words is "seventy-four million, seven hundred thirty-nine thousand, four hundred seventy-seven".