990852257 has 4 divisors (see below), whose sum is σ = 1002790320. Its totient is φ = 978914196.

The previous prime is 990852253. The next prime is 990852281. The reversal of 990852257 is 752258099.

990852257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 990852257 - 2² = 990852253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990852253) 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, 5968907 + ... + 5969072.

It is an arithmetic number, because the mean of its divisors is an integer number (250697580).

Almost surely, 2^990852257 is an apocalyptic number.

It is an amenable number.

990852257 is a deficient number, since it is larger than the sum of its proper divisors (11938063).

990852257 is a wasteful number, since it uses less digits than its factorization.

990852257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938062.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 990852257 is about 31477.8057843935. The cubic root of 990852257 is about 996.9414068792.

The spelling of 990852257 in words is "nine hundred ninety million, eight hundred fifty-two thousand, two hundred fifty-seven".