87851907 has 24 divisors (see below), whose sum is σ = 149084208. Its totient is φ = 49147200.

The previous prime is 87851879. The next prime is 87851909. The reversal of 87851907 is 70915878.

It is not a de Polignac number, because 87851907 - 2⁶ = 87851843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87851909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32844 + ... + 35417.

It is an arithmetic number, because the mean of its divisors is an integer number (6211842).

Almost surely, 2^87851907 is an apocalyptic number.

87851907 is a deficient number, since it is larger than the sum of its proper divisors (61232301).

87851907 is a wasteful number, since it uses less digits than its factorization.

87851907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68291 (or 68288 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 87851907 is about 9372.9348125334. The cubic root of 87851907 is about 444.5463659840.

The spelling of 87851907 in words is "eighty-seven million, eight hundred fifty-one thousand, nine hundred seven".