87856707 has 4 divisors (see below), whose sum is σ = 117142280. Its totient is φ = 58571136.

The previous prime is 87856693. The next prime is 87856721. The reversal of 87856707 is 70765878.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87856693) and next prime (87856721).

It is not a de Polignac number, because 87856707 - 2⁸ = 87856451 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87856787) 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, 14642782 + ... + 14642787.

It is an arithmetic number, because the mean of its divisors is an integer number (29285570).

Almost surely, 2^87856707 is an apocalyptic number.

87856707 is a deficient number, since it is larger than the sum of its proper divisors (29285573).

87856707 is a wasteful number, since it uses less digits than its factorization.

87856707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29285572.

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 87856707 is about 9373.1908654417. The cubic root of 87856707 is about 444.5544621228.

The spelling of 87856707 in words is "eighty-seven million, eight hundred fifty-six thousand, seven hundred seven".