921053644 has 24 divisors (see below), whose sum is σ = 1847936160. Its totient is φ = 393488256.

The previous prime is 921053641. The next prime is 921053681. The reversal of 921053644 is 446350129.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (921053641) 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, 43009 + ... + 60760.

It is an arithmetic number, because the mean of its divisors is an integer number (76997340).

Almost surely, 2^921053644 is an apocalyptic number.

It is an amenable number.

921053644 is an abundant number, since it is smaller than the sum of its proper divisors (926882516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921053644 is a wasteful number, since it uses less digits than its factorization.

921053644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104097 (or 104095 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 921053644 is about 30348.8656130670. The cubic root of 921053644 is about 972.9599752847.

The spelling of 921053644 in words is "nine hundred twenty-one million, fifty-three thousand, six hundred forty-four".