83918907 has 12 divisors (see below), whose sum is σ = 123026280. Its totient is φ = 55110528.

The previous prime is 83918903. The next prime is 83918917. The reversal of 83918907 is 70981938.

It is not a de Polignac number, because 83918907 - 2² = 83918903 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (83918903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68982 + ... + 70187.

It is an arithmetic number, because the mean of its divisors is an integer number (10252190).

Almost surely, 2^83918907 is an apocalyptic number.

83918907 is a deficient number, since it is larger than the sum of its proper divisors (39107373).

83918907 is a wasteful number, since it uses less digits than its factorization.

83918907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139242 (or 139239 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 83918907 is about 9160.7263358317. The cubic root of 83918907 is about 437.8109367297.

The spelling of 83918907 in words is "eighty-three million, nine hundred eighteen thousand, nine hundred seven".