87976431 has 12 divisors (see below), whose sum is σ = 128609208. Its totient is φ = 57943824.

The previous prime is 87976423. The next prime is 87976439. The reversal of 87976431 is 13467978.

It is an interprime number because it is at equal distance from previous prime (87976423) and next prime (87976439).

It is not a de Polignac number, because 87976431 - 2³ = 87976423 is a prime.

It is a super-2 number, since 2×87976431² = 15479704822995522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87976439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58140 + ... + 59633.

It is an arithmetic number, because the mean of its divisors is an integer number (10717434).

Almost surely, 2^87976431 is an apocalyptic number.

87976431 is a deficient number, since it is larger than the sum of its proper divisors (40632777).

87976431 is a wasteful number, since it uses less digits than its factorization.

87976431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117862 (or 117859 counting only the distinct ones).

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

The square root of 87976431 is about 9379.5752036006. The cubic root of 87976431 is about 444.7563047297.

The spelling of 87976431 in words is "eighty-seven million, nine hundred seventy-six thousand, four hundred thirty-one".