305799139 has 2 divisors, whose sum is σ = 305799140. Its totient is φ = 305799138.

The previous prime is 305799103. The next prime is 305799149. The reversal of 305799139 is 931997503.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 305799139 - 2²¹ = 303701987 is a prime.

It is a super-2 number, since 2×305799139² = 187026226826282642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (305799149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152899569 + 152899570.

It is an arithmetic number, because the mean of its divisors is an integer number (152899570).

Almost surely, 2^305799139 is an apocalyptic number.

305799139 is a deficient number, since it is larger than the sum of its proper divisors (1).

305799139 is an equidigital number, since it uses as much as digits as its factorization.

305799139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 305799139 is about 17487.1135125269. The cubic root of 305799139 is about 673.7189339285.

The spelling of 305799139 in words is "three hundred five million, seven hundred ninety-nine thousand, one hundred thirty-nine".