918521137 has 8 divisors (see below), whose sum is σ = 929348640. Its totient is φ = 907757280.

The previous prime is 918521129. The next prime is 918521171. The reversal of 918521137 is 731125819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 918521137 - 2³ = 918521129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 918521096 and 918521105.

It is not an unprimeable number, because it can be changed into a prime (918521117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13437 + ... + 44917.

It is an arithmetic number, because the mean of its divisors is an integer number (116168580).

Almost surely, 2^918521137 is an apocalyptic number.

It is an amenable number.

918521137 is a deficient number, since it is larger than the sum of its proper divisors (10827503).

918521137 is a wasteful number, since it uses less digits than its factorization.

918521137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31823.

The product of its digits is 15120, while the sum is 37.

The square root of 918521137 is about 30307.1136369005. The cubic root of 918521137 is about 972.0674142617.

The spelling of 918521137 in words is "nine hundred eighteen million, five hundred twenty-one thousand, one hundred thirty-seven".