992640263 has 2 divisors, whose sum is σ = 992640264. Its totient is φ = 992640262.

The previous prime is 992640247. The next prime is 992640269. The reversal of 992640263 is 362046299.

It is a strong prime.

It is an emirp because it is prime and its reverse (362046299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 992640263 - 2⁴ = 992640247 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 992640263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992640269) 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 as a sum of consecutive naturals, namely, 496320131 + 496320132.

It is an arithmetic number, because the mean of its divisors is an integer number (496320132).

Almost surely, 2^992640263 is an apocalyptic number.

992640263 is a deficient number, since it is larger than the sum of its proper divisors (1).

992640263 is an equidigital number, since it uses as much as digits as its factorization.

992640263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 992640263 is about 31506.1940418071. The cubic root of 992640263 is about 997.5407111899.

The spelling of 992640263 in words is "nine hundred ninety-two million, six hundred forty thousand, two hundred sixty-three".