990692647 has 8 divisors (see below), whose sum is σ = 1139167616. Its totient is φ = 843954552.

The previous prime is 990692611. The next prime is 990692653. The reversal of 990692647 is 746296099.

990692647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-990692647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990692594 and 990692603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990692687) 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, 432993 + ... + 435274.

It is an arithmetic number, because the mean of its divisors is an integer number (142395952).

Almost surely, 2^990692647 is an apocalyptic number.

990692647 is a deficient number, since it is larger than the sum of its proper divisors (148474969).

990692647 is a wasteful number, since it uses less digits than its factorization.

990692647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868437.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 990692647 is about 31475.2704039219. The cubic root of 990692647 is about 996.8878737173.

The spelling of 990692647 in words is "nine hundred ninety million, six hundred ninety-two thousand, six hundred forty-seven".