921363998 has 16 divisors (see below), whose sum is σ = 1455390720. Its totient is φ = 436253976.

The previous prime is 921363997. The next prime is 921364009. The reversal of 921363998 is 899363129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921363997) 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, 146915 + ... + 153057.

It is an arithmetic number, because the mean of its divisors is an integer number (90961920).

Almost surely, 2^921363998 is an apocalyptic number.

921363998 is a deficient number, since it is larger than the sum of its proper divisors (534026722).

921363998 is a wasteful number, since it uses less digits than its factorization.

921363998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111.

The product of its digits is 629856, while the sum is 50.

The square root of 921363998 is about 30353.9782895093. The cubic root of 921363998 is about 973.0692443856.

The spelling of 921363998 in words is "nine hundred twenty-one million, three hundred sixty-three thousand, nine hundred ninety-eight".