921098972 has 12 divisors (see below), whose sum is σ = 1614024720. Its totient is φ = 459949056.

The previous prime is 921098951. The next prime is 921098977. The reversal of 921098972 is 279890129.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921098977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146648 + ... + 152799.

It is an arithmetic number, because the mean of its divisors is an integer number (134502060).

Almost surely, 2^921098972 is an apocalyptic number.

It is an amenable number.

921098972 is a deficient number, since it is larger than the sum of its proper divisors (692925748).

921098972 is a wasteful number, since it uses less digits than its factorization.

921098972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300220 (or 300218 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 921098972 is about 30349.6123863222. The cubic root of 921098972 is about 972.9759358485.

The spelling of 921098972 in words is "nine hundred twenty-one million, ninety-eight thousand, nine hundred seventy-two".