87106815 has 12 divisors (see below), whose sum is σ = 150985224. Its totient is φ = 46456944.

The previous prime is 87106813. The next prime is 87106823. The reversal of 87106815 is 51860178.

It is not a de Polignac number, because 87106815 - 2¹ = 87106813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87106815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87106813) 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, 967809 + ... + 967898.

It is an arithmetic number, because the mean of its divisors is an integer number (12582102).

Almost surely, 2^87106815 is an apocalyptic number.

87106815 is a deficient number, since it is larger than the sum of its proper divisors (63878409).

87106815 is a wasteful number, since it uses less digits than its factorization.

87106815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935718 (or 1935715 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 87106815 is about 9333.1031816861. The cubic root of 87106815 is about 443.2860299025.

The spelling of 87106815 in words is "eighty-seven million, one hundred six thousand, eight hundred fifteen".