83987670 has 32 divisors (see below), whose sum is σ = 217076832. Its totient is φ = 20673792.

The previous prime is 83987653. The next prime is 83987681. The reversal of 83987670 is 7678938.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107287 + ... + 108066.

It is an arithmetic number, because the mean of its divisors is an integer number (6783651).

Almost surely, 2^83987670 is an apocalyptic number.

83987670 is an abundant number, since it is smaller than the sum of its proper divisors (133089162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83987670 is a wasteful number, since it uses less digits than its factorization.

83987670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215376.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 83987670 is about 9164.4787085791. The cubic root of 83987670 is about 437.9304845787.

The spelling of 83987670 in words is "eighty-three million, nine hundred eighty-seven thousand, six hundred seventy".