889621979 has 2 divisors, whose sum is σ = 889621980. Its totient is φ = 889621978.

The previous prime is 889621963. The next prime is 889622011. The reversal of 889621979 is 979126988.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 889621979 - 2⁴ = 889621963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (889621079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444810989 + 444810990.

It is an arithmetic number, because the mean of its divisors is an integer number (444810990).

Almost surely, 2^889621979 is an apocalyptic number.

889621979 is a deficient number, since it is larger than the sum of its proper divisors (1).

889621979 is an equidigital number, since it uses as much as digits as its factorization.

889621979 is an evil number, because the sum of its binary digits is even.

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

The square root of 889621979 is about 29826.5314611002. The cubic root of 889621979 is about 961.7639656308.

The spelling of 889621979 in words is "eight hundred eighty-nine million, six hundred twenty-one thousand, nine hundred seventy-nine".