383139979 has 2 divisors, whose sum is σ = 383139980. Its totient is φ = 383139978.

The previous prime is 383139961. The next prime is 383140027. The reversal of 383139979 is 979931383.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 383139979 - 2¹⁹ = 382615691 is a prime.

It is not a weakly prime, because it can be changed into another prime (383139179) 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, 191569989 + 191569990.

It is an arithmetic number, because the mean of its divisors is an integer number (191569990).

Almost surely, 2^383139979 is an apocalyptic number.

383139979 is a deficient number, since it is larger than the sum of its proper divisors (1).

383139979 is an equidigital number, since it uses as much as digits as its factorization.

383139979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 52.

The square root of 383139979 is about 19573.9617604613. The cubic root of 383139979 is about 726.3052058840.

The spelling of 383139979 in words is "three hundred eighty-three million, one hundred thirty-nine thousand, nine hundred seventy-nine".