87615253 has 6 divisors (see below), whose sum is σ = 96304502. Its totient is φ = 79650120.

The previous prime is 87615239. The next prime is 87615259. The reversal of 87615253 is 35251678.

It can be written as a sum of positive squares in only one way, i.e., 85784644 + 1830609 = 9262^2 + 1353^2 .

It is not a de Polignac number, because 87615253 - 2⁵ = 87615221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87615259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 361926 + ... + 362167.

Almost surely, 2^87615253 is an apocalyptic number.

It is an amenable number.

87615253 is a deficient number, since it is larger than the sum of its proper divisors (8689249).

87615253 is a wasteful number, since it uses less digits than its factorization.

87615253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724115 (or 724104 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 87615253 is about 9360.3019716246. The cubic root of 87615253 is about 444.1468364947.

It can be divided in two parts, 876 and 15253, that added together give a square (16129 = 127²).

The spelling of 87615253 in words is "eighty-seven million, six hundred fifteen thousand, two hundred fifty-three".