87708513 has 4 divisors (see below), whose sum is σ = 116944688. Its totient is φ = 58472340.

The previous prime is 87708497. The next prime is 87708529. The reversal of 87708513 is 31580778.

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 an interprime number because it is at equal distance from previous prime (87708497) and next prime (87708529).

It is not a de Polignac number, because 87708513 - 2⁴ = 87708497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87708563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14618083 + ... + 14618088.

It is an arithmetic number, because the mean of its divisors is an integer number (29236172).

Almost surely, 2^87708513 is an apocalyptic number.

It is an amenable number.

87708513 is a deficient number, since it is larger than the sum of its proper divisors (29236175).

87708513 is a wasteful number, since it uses less digits than its factorization.

87708513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29236174.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 87708513 is about 9365.2823235608. The cubic root of 87708513 is about 444.3043678402.

The spelling of 87708513 in words is "eighty-seven million, seven hundred eight thousand, five hundred thirteen".