87913818 has 12 divisors (see below), whose sum is σ = 190479978. Its totient is φ = 29304600.

The previous prime is 87913781. The next prime is 87913823. The reversal of 87913818 is 81831978.

It can be written as a sum of positive squares in only one way, i.e., 43996689 + 43917129 = 6633^2 + 6627^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2442033 + ... + 2442068.

Almost surely, 2^87913818 is an apocalyptic number.

87913818 is an abundant number, since it is smaller than the sum of its proper divisors (102566160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87913818 is a wasteful number, since it uses less digits than its factorization.

87913818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884109 (or 4884106 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 87913818 is about 9376.2368784070. The cubic root of 87913818 is about 444.6507683750.

It can be divided in two parts, 879138 and 18, that multiplied together give a square (15824484 = 3978²).

The spelling of 87913818 in words is "eighty-seven million, nine hundred thirteen thousand, eight hundred eighteen".