990645357 has 8 divisors (see below), whose sum is σ = 1422465184. Its totient is φ = 609627888.

The previous prime is 990645347. The next prime is 990645373. The reversal of 990645357 is 753546099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990645357 - 2¹¹ = 990643309 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 (990645347) 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, 12700543 + ... + 12700620.

It is an arithmetic number, because the mean of its divisors is an integer number (177808148).

Almost surely, 2^990645357 is an apocalyptic number.

It is an amenable number.

990645357 is a deficient number, since it is larger than the sum of its proper divisors (431819827).

990645357 is a wasteful number, since it uses less digits than its factorization.

990645357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25401179.

The product of its (nonzero) digits is 1020600, while the sum is 48.

The square root of 990645357 is about 31474.5191702749. The cubic root of 990645357 is about 996.8720115567.

The spelling of 990645357 in words is "nine hundred ninety million, six hundred forty-five thousand, three hundred fifty-seven".