889961279 has 2 divisors, whose sum is σ = 889961280. Its totient is φ = 889961278.

The previous prime is 889961231. The next prime is 889961321. The reversal of 889961279 is 972169988.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 889961279 - 2²⁸ = 621525823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889961209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444980639 + 444980640.

It is an arithmetic number, because the mean of its divisors is an integer number (444980640).

Almost surely, 2^889961279 is an apocalyptic number.

889961279 is a deficient number, since it is larger than the sum of its proper divisors (1).

889961279 is an equidigital number, since it uses as much as digits as its factorization.

889961279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 59.

The square root of 889961279 is about 29832.2188078594. The cubic root of 889961279 is about 961.8862216913.

The spelling of 889961279 in words is "eight hundred eighty-nine million, nine hundred sixty-one thousand, two hundred seventy-nine".