990971322 has 16 divisors (see below), whose sum is σ = 2162119392. Its totient is φ = 300294320.

The previous prime is 990971273. The next prime is 990971323. The reversal of 990971322 is 223179099.

It is a happy number.

It is a super-2 number, since 2×990971322² = 1964048322052855368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990971323) 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, 7507293 + ... + 7507424.

It is an arithmetic number, because the mean of its divisors is an integer number (135132462).

Almost surely, 2^990971322 is an apocalyptic number.

990971322 is an abundant number, since it is smaller than the sum of its proper divisors (1171148070).

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

990971322 is a wasteful number, since it uses less digits than its factorization.

990971322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15014733.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 990971322 is about 31479.6969807525. The cubic root of 990971322 is about 996.9813375125.

The spelling of 990971322 in words is "nine hundred ninety million, nine hundred seventy-one thousand, three hundred twenty-two".