921223748 has 12 divisors (see below), whose sum is σ = 1612355052. Its totient is φ = 460550880.

The previous prime is 921223739. The next prime is 921223753. The reversal of 921223748 is 847322129.

It can be written as a sum of positive squares in 2 ways, for example, as 483912004 + 437311744 = 21998^2 + 20912^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46658 + ... + 63398.

It is an arithmetic number, because the mean of its divisors is an integer number (134362921).

Almost surely, 2^921223748 is an apocalyptic number.

It is an amenable number.

921223748 is a deficient number, since it is larger than the sum of its proper divisors (691131304).

921223748 is a wasteful number, since it uses less digits than its factorization.

921223748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30502 (or 30500 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 921223748 is about 30351.6679607563. The cubic root of 921223748 is about 973.0198683565.

The spelling of 921223748 in words is "nine hundred twenty-one million, two hundred twenty-three thousand, seven hundred forty-eight".