87437865 has 8 divisors (see below), whose sum is σ = 139900608. Its totient is φ = 46633520.

The previous prime is 87437839. The next prime is 87437893. The reversal of 87437865 is 56873478.

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

It is not a de Polignac number, because 87437865 - 2⁷ = 87437737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2914581 + ... + 2914610.

It is an arithmetic number, because the mean of its divisors is an integer number (17487576).

Almost surely, 2^87437865 is an apocalyptic number.

It is an amenable number.

87437865 is a deficient number, since it is larger than the sum of its proper divisors (52462743).

87437865 is a wasteful number, since it uses less digits than its factorization.

87437865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5829199.

The product of its digits is 1128960, while the sum is 48.

The square root of 87437865 is about 9350.8216216544. The cubic root of 87437865 is about 443.8468904346.

The spelling of 87437865 in words is "eighty-seven million, four hundred thirty-seven thousand, eight hundred sixty-five".