349777139 has 2 divisors, whose sum is σ = 349777140. Its totient is φ = 349777138.

The previous prime is 349777097. The next prime is 349777151. The reversal of 349777139 is 931777943.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 349777139 - 2²⁰ = 348728563 is a prime.

It is not a weakly prime, because it can be changed into another prime (349777199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174888569 + 174888570.

It is an arithmetic number, because the mean of its divisors is an integer number (174888570).

Almost surely, 2^349777139 is an apocalyptic number.

349777139 is a deficient number, since it is larger than the sum of its proper divisors (1).

349777139 is an equidigital number, since it uses as much as digits as its factorization.

349777139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000188, while the sum is 50.

The square root of 349777139 is about 18702.3297746564. The cubic root of 349777139 is about 704.5802635387.

The spelling of 349777139 in words is "three hundred forty-nine million, seven hundred seventy-seven thousand, one hundred thirty-nine".