992374639 has 2 divisors, whose sum is σ = 992374640. Its totient is φ = 992374638.

The previous prime is 992374637. The next prime is 992374723. The reversal of 992374639 is 936473299.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 992374639 - 2¹ = 992374637 is a prime.

Together with 992374637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992374637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496187319 + 496187320.

It is an arithmetic number, because the mean of its divisors is an integer number (496187320).

Almost surely, 2^992374639 is an apocalyptic number.

992374639 is a deficient number, since it is larger than the sum of its proper divisors (1).

992374639 is an equidigital number, since it uses as much as digits as its factorization.

992374639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 52.

The square root of 992374639 is about 31501.9783347015. The cubic root of 992374639 is about 997.4517248095.

The spelling of 992374639 in words is "nine hundred ninety-two million, three hundred seventy-four thousand, six hundred thirty-nine".