87431841 has 12 divisors (see below), whose sum is σ = 144332032. Its totient is φ = 49961016.

The previous prime is 87431831. The next prime is 87431921. The reversal of 87431841 is 14813478.

It is not a de Polignac number, because 87431841 - 2⁷ = 87431713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87431796 and 87431805.

It is not an unprimeable number, because it can be changed into a prime (87431801) 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, 693841 + ... + 693966.

Almost surely, 2^87431841 is an apocalyptic number.

It is an amenable number.

87431841 is a deficient number, since it is larger than the sum of its proper divisors (56900191).

87431841 is a wasteful number, since it uses less digits than its factorization.

87431841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387820 (or 1387817 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 87431841 is about 9350.4995053740. The cubic root of 87431841 is about 443.8366973103.

The spelling of 87431841 in words is "eighty-seven million, four hundred thirty-one thousand, eight hundred forty-one".