230139979 has 2 divisors, whose sum is σ = 230139980. Its totient is φ = 230139978.

The previous prime is 230139977. The next prime is 230139983. The reversal of 230139979 is 979931032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 230139979 - 2¹ = 230139977 is a prime.

Together with 230139977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (230139977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115069989 + 115069990.

It is an arithmetic number, because the mean of its divisors is an integer number (115069990).

Almost surely, 2^230139979 is an apocalyptic number.

230139979 is a deficient number, since it is larger than the sum of its proper divisors (1).

230139979 is an equidigital number, since it uses as much as digits as its factorization.

230139979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 230139979 is about 15170.3651571081. The cubic root of 230139979 is about 612.8168381025.

The spelling of 230139979 in words is "two hundred thirty million, one hundred thirty-nine thousand, nine hundred seventy-nine".