87040431 has 6 divisors (see below), whose sum is σ = 125725080. Its totient is φ = 58026948.

The previous prime is 87040427. The next prime is 87040507. The reversal of 87040431 is 13404078.

It is not a de Polignac number, because 87040431 - 2² = 87040427 is a prime.

It is a super-2 number, since 2×87040431² = 15152073257331522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87040395 and 87040404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87040231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4835571 + ... + 4835588.

It is an arithmetic number, because the mean of its divisors is an integer number (20954180).

Almost surely, 2^87040431 is an apocalyptic number.

87040431 is a deficient number, since it is larger than the sum of its proper divisors (38684649).

87040431 is a wasteful number, since it uses less digits than its factorization.

87040431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671165 (or 9671162 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 87040431 is about 9329.5461304396. The cubic root of 87040431 is about 443.1733920320.

The spelling of 87040431 in words is "eighty-seven million, forty thousand, four hundred thirty-one".