87474431 has 8 divisors (see below), whose sum is σ = 95741184. Its totient is φ = 79260120.

The previous prime is 87474397. The next prime is 87474437. The reversal of 87474431 is 13447478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87474431 - 2²⁶ = 20365567 is a prime.

It is a super-2 number, since 2×87474431² = 15303552157547522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87474437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9575 + ... + 16328.

It is an arithmetic number, because the mean of its divisors is an integer number (11967648).

Almost surely, 2^87474431 is an apocalyptic number.

87474431 is a deficient number, since it is larger than the sum of its proper divisors (8266753).

87474431 is a wasteful number, since it uses less digits than its factorization.

87474431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26221.

The product of its digits is 75264, while the sum is 38.

The square root of 87474431 is about 9352.7766465366. The cubic root of 87474431 is about 443.9087531967.

The spelling of 87474431 in words is "eighty-seven million, four hundred seventy-four thousand, four hundred thirty-one".