990576671 has 4 divisors (see below), whose sum is σ = 1132087632. Its totient is φ = 849065712.

The previous prime is 990576667. The next prime is 990576679. The reversal of 990576671 is 176675099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 990576671 - 2² = 990576667 is a prime.

It is a super-2 number, since 2×990576671² = 1962484282258884482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990576679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70755470 + ... + 70755483.

It is an arithmetic number, because the mean of its divisors is an integer number (283021908).

Almost surely, 2^990576671 is an apocalyptic number.

990576671 is a deficient number, since it is larger than the sum of its proper divisors (141510961).

990576671 is a wasteful number, since it uses less digits than its factorization.

990576671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141510960.

The product of its (nonzero) digits is 714420, while the sum is 50.

The square root of 990576671 is about 31473.4280147556. The cubic root of 990576671 is about 996.8489717833.

The spelling of 990576671 in words is "nine hundred ninety million, five hundred seventy-six thousand, six hundred seventy-one".