87715839 has 8 divisors (see below), whose sum is σ = 118160560. Its totient is φ = 57874176.

The previous prime is 87715787. The next prime is 87715883. The reversal of 87715839 is 93851778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87715839 - 2¹³ = 87707647 is a prime.

It is a super-2 number, since 2×87715839² = 15388136822947842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87715139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150424 + ... + 151005.

It is an arithmetic number, because the mean of its divisors is an integer number (14770070).

Almost surely, 2^87715839 is an apocalyptic number.

87715839 is a deficient number, since it is larger than the sum of its proper divisors (30444721).

87715839 is a wasteful number, since it uses less digits than its factorization.

87715839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301529.

The product of its digits is 423360, while the sum is 48.

The square root of 87715839 is about 9365.6734408157. The cubic root of 87715839 is about 444.3167379172.

The spelling of 87715839 in words is "eighty-seven million, seven hundred fifteen thousand, eight hundred thirty-nine".