992972121 has 4 divisors (see below), whose sum is σ = 1323962832. Its totient is φ = 661981412.

The previous prime is 992972117. The next prime is 992972131. The reversal of 992972121 is 121279299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 992972121 - 2² = 992972117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (992972111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165495351 + ... + 165495356.

It is an arithmetic number, because the mean of its divisors is an integer number (330990708).

Almost surely, 2^992972121 is an apocalyptic number.

It is an amenable number.

992972121 is a deficient number, since it is larger than the sum of its proper divisors (330990711).

992972121 is a wasteful number, since it uses less digits than its factorization.

992972121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330990710.

The product of its digits is 40824, while the sum is 42.

The square root of 992972121 is about 31511.4601534109. The cubic root of 992972121 is about 997.6518642408.

The spelling of 992972121 in words is "nine hundred ninety-two million, nine hundred seventy-two thousand, one hundred twenty-one".