990792317 has 8 divisors (see below), whose sum is σ = 1066273272. Its totient is φ = 917222400.

The previous prime is 990792307. The next prime is 990792343. The reversal of 990792317 is 713297099.

It can be written as a sum of positive squares in 4 ways, for example, as 11978521 + 978813796 = 3461^2 + 31286^2 .

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 990792317 - 2⁴ = 990792301 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 (990792307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476684 + ... + 478757.

It is an arithmetic number, because the mean of its divisors is an integer number (133284159).

Almost surely, 2^990792317 is an apocalyptic number.

It is an amenable number.

990792317 is a deficient number, since it is larger than the sum of its proper divisors (75480955).

990792317 is a wasteful number, since it uses less digits than its factorization.

990792317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955519.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 990792317 is about 31476.8536705942. The cubic root of 990792317 is about 996.9213036894.

The spelling of 990792317 in words is "nine hundred ninety million, seven hundred ninety-two thousand, three hundred seventeen".