87494517 has 12 divisors (see below), whose sum is σ = 137870304. Its totient is φ = 53026920.

The previous prime is 87494503. The next prime is 87494521. The reversal of 87494517 is 71549478.

It is a happy number.

It is not a de Polignac number, because 87494517 - 2⁷ = 87494389 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87494527) 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, 441793 + ... + 441990.

It is an arithmetic number, because the mean of its divisors is an integer number (11489192).

Almost surely, 2^87494517 is an apocalyptic number.

It is an amenable number.

87494517 is a deficient number, since it is larger than the sum of its proper divisors (50375787).

87494517 is a wasteful number, since it uses less digits than its factorization.

87494517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883800 (or 883797 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 87494517 is about 9353.8503836655. The cubic root of 87494517 is about 443.9427275773.

The spelling of 87494517 in words is "eighty-seven million, four hundred ninety-four thousand, five hundred seventeen".