889998979 has 2 divisors, whose sum is σ = 889998980. Its totient is φ = 889998978.

The previous prime is 889998953. The next prime is 889998997. The reversal of 889998979 is 979899988.

Together with next prime (889998997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 889998979 - 2¹⁵ = 889966211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (889992979) 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 as a sum of consecutive naturals, namely, 444999489 + 444999490.

It is an arithmetic number, because the mean of its divisors is an integer number (444999490).

Almost surely, 2^889998979 is an apocalyptic number.

889998979 is a deficient number, since it is larger than the sum of its proper divisors (1).

889998979 is an equidigital number, since it uses as much as digits as its factorization.

889998979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211631616, while the sum is 76.

The square root of 889998979 is about 29832.8506683488. The cubic root of 889998979 is about 961.8998037798.

The spelling of 889998979 in words is "eight hundred eighty-nine million, nine hundred ninety-eight thousand, nine hundred seventy-nine".