921896918 has 8 divisors (see below), whose sum is σ = 1386763848. Its totient is φ = 459642304.

The previous prime is 921896917. The next prime is 921896923. The reversal of 921896918 is 819698129.

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

It is a self number, because there is not a number n which added to its sum of digits gives 921896918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921896917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652196 + ... + 653607.

It is an arithmetic number, because the mean of its divisors is an integer number (173345481).

Almost surely, 2^921896918 is an apocalyptic number.

921896918 is a deficient number, since it is larger than the sum of its proper divisors (464866930).

921896918 is a wasteful number, since it uses less digits than its factorization.

921896918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306158.

The product of its digits is 559872, while the sum is 53.

The square root of 921896918 is about 30362.7554414944. The cubic root of 921896918 is about 973.2568170548.

The spelling of 921896918 in words is "nine hundred twenty-one million, eight hundred ninety-six thousand, nine hundred eighteen".