87519513 has 4 divisors (see below), whose sum is σ = 116692688. Its totient is φ = 58346340.

The previous prime is 87519503. The next prime is 87519539. The reversal of 87519513 is 31591578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87519513 - 2¹⁸ = 87257369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87519503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14586583 + ... + 14586588.

It is an arithmetic number, because the mean of its divisors is an integer number (29173172).

Almost surely, 2^87519513 is an apocalyptic number.

It is an amenable number.

87519513 is a deficient number, since it is larger than the sum of its proper divisors (29173175).

87519513 is a wasteful number, since it uses less digits than its factorization.

87519513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29173174.

The product of its digits is 37800, while the sum is 39.

The square root of 87519513 is about 9355.1864225145. The cubic root of 87519513 is about 443.9849996961.

The spelling of 87519513 in words is "eighty-seven million, five hundred nineteen thousand, five hundred thirteen".