921720922 has 16 divisors (see below), whose sum is σ = 1403075520. Its totient is φ = 454043232.

The previous prime is 921720911. The next prime is 921720937. The reversal of 921720922 is 229027129.

921720922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152229 + ... + 158167.

It is an arithmetic number, because the mean of its divisors is an integer number (87692220).

Almost surely, 2^921720922 is an apocalyptic number.

921720922 is a deficient number, since it is larger than the sum of its proper divisors (481354598).

921720922 is a wasteful number, since it uses less digits than its factorization.

921720922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 921720922 is about 30359.8570813500. The cubic root of 921720922 is about 973.1948794691.

The spelling of 921720922 in words is "nine hundred twenty-one million, seven hundred twenty thousand, nine hundred twenty-two".