921939814 has 8 divisors (see below), whose sum is σ = 1427519808. Its totient is φ = 446099880.

The previous prime is 921939803. The next prime is 921939833. The reversal of 921939814 is 418939129.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7434937 + ... + 7435060.

It is an arithmetic number, because the mean of its divisors is an integer number (178439976).

Almost surely, 2^921939814 is an apocalyptic number.

921939814 is a deficient number, since it is larger than the sum of its proper divisors (505579994).

921939814 is a wasteful number, since it uses less digits than its factorization.

921939814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14870030.

The product of its digits is 139968, while the sum is 46.

The square root of 921939814 is about 30363.4618250291. The cubic root of 921939814 is about 973.2719120819.

The spelling of 921939814 in words is "nine hundred twenty-one million, nine hundred thirty-nine thousand, eight hundred fourteen".