87273513 has 12 divisors (see below), whose sum is σ = 126970480. Its totient is φ = 57762936.

The previous prime is 87273497. The next prime is 87273547. The reversal of 87273513 is 31537278.

87273513 is a `hidden beast` number, since 8 + 72 + 73 + 513 = 666.

It is not a de Polignac number, because 87273513 - 2⁴ = 87273497 is a prime.

It is a super-2 number, since 2×87273513² = 15233332142722338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87273113) 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, 33631 + ... + 36132.

Almost surely, 2^87273513 is an apocalyptic number.

It is an amenable number.

87273513 is a deficient number, since it is larger than the sum of its proper divisors (39696967).

87273513 is a wasteful number, since it uses less digits than its factorization.

87273513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69908 (or 69905 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 87273513 is about 9342.0293833835. The cubic root of 87273513 is about 443.5686247321.

The spelling of 87273513 in words is "eighty-seven million, two hundred seventy-three thousand, five hundred thirteen".