87856907 has 4 divisors (see below), whose sum is σ = 90231456. Its totient is φ = 85482360.

The previous prime is 87856903. The next prime is 87856913. The reversal of 87856907 is 70965878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70965878 = 2 ⋅35482939.

It is a cyclic number.

It is not a de Polignac number, because 87856907 - 2² = 87856903 is a prime.

It is a super-2 number, since 2×87856907² = 15437672215213298, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (87856903) 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, 1187219 + ... + 1187292.

It is an arithmetic number, because the mean of its divisors is an integer number (22557864).

Almost surely, 2^87856907 is an apocalyptic number.

87856907 is a deficient number, since it is larger than the sum of its proper divisors (2374549).

87856907 is a wasteful number, since it uses less digits than its factorization.

87856907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374548.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 87856907 is about 9373.2015341611. The cubic root of 87856907 is about 444.5547994555.

The spelling of 87856907 in words is "eighty-seven million, eight hundred fifty-six thousand, nine hundred seven".