990654297 has 16 divisors (see below), whose sum is σ = 1395498240. Its totient is φ = 624092672.

The previous prime is 990654193. The next prime is 990654331. The reversal of 990654297 is 792456099.

It is a cyclic number.

It is not a de Polignac number, because 990654297 - 2¹⁶ = 990588761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990614297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117048 + ... + 125225.

It is an arithmetic number, because the mean of its divisors is an integer number (87218640).

Almost surely, 2^990654297 is an apocalyptic number.

It is an amenable number.

990654297 is a deficient number, since it is larger than the sum of its proper divisors (404843943).

990654297 is a wasteful number, since it uses less digits than its factorization.

990654297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242352.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The square root of 990654297 is about 31474.6611895982. The cubic root of 990654297 is about 996.8750102783.

The spelling of 990654297 in words is "nine hundred ninety million, six hundred fifty-four thousand, two hundred ninety-seven".