87708213 has 12 divisors (see below), whose sum is σ = 126956128. Its totient is φ = 58349160.

The previous prime is 87708197. The next prime is 87708239. The reversal of 87708213 is 31280778.

It is not a de Polignac number, because 87708213 - 2⁴ = 87708197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87758213) 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 11 ways as a sum of consecutive naturals, for example, 5623 + ... + 14388.

Almost surely, 2^87708213 is an apocalyptic number.

It is an amenable number.

87708213 is a deficient number, since it is larger than the sum of its proper divisors (39247915).

87708213 is a wasteful number, since it uses less digits than its factorization.

87708213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20504 (or 20501 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 87708213 is about 9365.2663069450. The cubic root of 87708213 is about 444.3038612703.

The spelling of 87708213 in words is "eighty-seven million, seven hundred eight thousand, two hundred thirteen".