992499221 has 8 divisors (see below), whose sum is σ = 1140225024. Its totient is φ = 846258480.

The previous prime is 992499163. The next prime is 992499229. The reversal of 992499221 is 122994299.

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 992499221 - 2¹⁰ = 992498197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992499229) 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, 369830 + ... + 372503.

It is an arithmetic number, because the mean of its divisors is an integer number (142528128).

Almost surely, 2^992499221 is an apocalyptic number.

It is an amenable number.

992499221 is a deficient number, since it is larger than the sum of its proper divisors (147725803).

992499221 is a wasteful number, since it uses less digits than its factorization.

992499221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742531.

The product of its digits is 209952, while the sum is 47.

The square root of 992499221 is about 31503.9556405224. The cubic root of 992499221 is about 997.4934628542.

The spelling of 992499221 in words is "nine hundred ninety-two million, four hundred ninety-nine thousand, two hundred twenty-one".