74638971 has 18 divisors (see below), whose sum is σ = 118505660. Its totient is φ = 45235080.

The previous prime is 74638951. The next prime is 74638997. The reversal of 74638971 is 17983647.

74638971 is a `hidden beast` number, since 7 + 4 + 638 + 9 + 7 + 1 = 666.

It is not a de Polignac number, because 74638971 - 2¹⁹ = 74114683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74638931) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33181 + ... + 35358.

Almost surely, 2^74638971 is an apocalyptic number.

74638971 is a deficient number, since it is larger than the sum of its proper divisors (43866689).

74638971 is a wasteful number, since it uses less digits than its factorization.

74638971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68567 (or 68553 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 74638971 is about 8639.3848739363. The cubic root of 74638971 is about 421.0385691819.

The spelling of 74638971 in words is "seventy-four million, six hundred thirty-eight thousand, nine hundred seventy-one".