918996689 has 8 divisors (see below), whose sum is σ = 1023816360. Its totient is φ = 819052416.

The previous prime is 918996647. The next prime is 918996707. The reversal of 918996689 is 986699819.

It can be written as a sum of positive squares in 4 ways, for example, as 65480464 + 853516225 = 8092^2 + 29215^2 .

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

It is not a de Polignac number, because 918996689 - 2⁸ = 918996433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918996619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218452 + ... + 1219205.

It is an arithmetic number, because the mean of its divisors is an integer number (127977045).

Almost surely, 2^918996689 is an apocalyptic number.

It is an amenable number.

918996689 is a deficient number, since it is larger than the sum of its proper divisors (104819671).

918996689 is a wasteful number, since it uses less digits than its factorization.

918996689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437699.

The product of its digits is 15116544, while the sum is 65.

The square root of 918996689 is about 30314.9581724930. The cubic root of 918996689 is about 972.2351436074.

The spelling of 918996689 in words is "nine hundred eighteen million, nine hundred ninety-six thousand, six hundred eighty-nine".