918139837 has 16 divisors (see below), whose sum is σ = 946003968. Its totient is φ = 890814960.

The previous prime is 918139811. The next prime is 918139847. The reversal of 918139837 is 738931819.

It is a cyclic number.

It is not a de Polignac number, because 918139837 - 2²⁷ = 783922109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918139847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1630518 + ... + 1631080.

It is an arithmetic number, because the mean of its divisors is an integer number (59125248).

Almost surely, 2^918139837 is an apocalyptic number.

It is an amenable number.

918139837 is a deficient number, since it is larger than the sum of its proper divisors (27864131).

918139837 is a wasteful number, since it uses less digits than its factorization.

918139837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its digits is 326592, while the sum is 49.

The square root of 918139837 is about 30300.8223815790. The cubic root of 918139837 is about 971.9328861997.

The spelling of 918139837 in words is "nine hundred eighteen million, one hundred thirty-nine thousand, eight hundred thirty-seven".