992055721 has 8 divisors (see below), whose sum is σ = 1069740000. Its totient is φ = 916918560.

The previous prime is 992055697. The next prime is 992055733. The reversal of 992055721 is 127550299.

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

It is a cyclic number.

It is not a de Polignac number, because 992055721 - 2¹⁵ = 992022953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (992055121) 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, 635971 + ... + 637528.

It is an arithmetic number, because the mean of its divisors is an integer number (133717500).

Almost surely, 2^992055721 is an apocalyptic number.

It is an amenable number.

992055721 is a deficient number, since it is larger than the sum of its proper divisors (77684279).

992055721 is a wasteful number, since it uses less digits than its factorization.

992055721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273559.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 992055721 is about 31496.9160553855. The cubic root of 992055721 is about 997.3448634895.

The spelling of 992055721 in words is "nine hundred ninety-two million, fifty-five thousand, seven hundred twenty-one".