7992889 has 2 divisors, whose sum is σ = 7992890. Its totient is φ = 7992888.

The previous prime is 7992871. The next prime is 7992923. The reversal of 7992889 is 9882997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5368489 + 2624400 = 2317^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 7992889 - 2⁵ = 7992857 is a prime.

It is an Ulam number.

7992889 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7992869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3996444 + 3996445.

It is an arithmetic number, because the mean of its divisors is an integer number (3996445).

Almost surely, 2^7992889 is an apocalyptic number.

It is an amenable number.

7992889 is a deficient number, since it is larger than the sum of its proper divisors (1).

7992889 is an equidigital number, since it uses as much as digits as its factorization.

7992889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 52.

The square root of 7992889 is about 2827.1697861996. The cubic root of 7992889 is about 199.9407241002.

The spelling of 7992889 in words is "seven million, nine hundred ninety-two thousand, eight hundred eighty-nine".