87436431 has 12 divisors (see below), whose sum is σ = 126486360. Its totient is φ = 58203600.

The previous prime is 87436381. The next prime is 87436451. The reversal of 87436431 is 13463478.

87436431 is a `hidden beast` number, since 8 + 7 + 4 + 3 + 643 + 1 = 666.

It is not a de Polignac number, because 87436431 - 2⁶ = 87436367 is a prime.

It is a super-2 number, since 2×87436431² = 15290258932035522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87436451) 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, 621 + ... + 13238.

It is an arithmetic number, because the mean of its divisors is an integer number (10540530).

Almost surely, 2^87436431 is an apocalyptic number.

87436431 is a deficient number, since it is larger than the sum of its proper divisors (39049929).

87436431 is a wasteful number, since it uses less digits than its factorization.

87436431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14566 (or 14563 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 87436431 is about 9350.7449435860. The cubic root of 87436431 is about 443.8444640261.

The spelling of 87436431 in words is "eighty-seven million, four hundred thirty-six thousand, four hundred thirty-one".