87779907 has 6 divisors (see below), whose sum is σ = 126793212. Its totient is φ = 58519932.

The previous prime is 87779863. The next prime is 87779929. The reversal of 87779907 is 70997778.

It is not a de Polignac number, because 87779907 - 2⁷ = 87779779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87779957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4876653 + ... + 4876670.

It is an arithmetic number, because the mean of its divisors is an integer number (21132202).

Almost surely, 2^87779907 is an apocalyptic number.

87779907 is a deficient number, since it is larger than the sum of its proper divisors (39013305).

87779907 is a wasteful number, since it uses less digits than its factorization.

87779907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9753329 (or 9753326 counting only the distinct ones).

The product of its (nonzero) digits is 1555848, while the sum is 54.

The square root of 87779907 is about 9369.0931791716. The cubic root of 87779907 is about 444.4248884983.

The spelling of 87779907 in words is "eighty-seven million, seven hundred seventy-nine thousand, nine hundred seven".