349777931 has 2 divisors, whose sum is σ = 349777932. Its totient is φ = 349777930.

The previous prime is 349777919. The next prime is 349777933. The reversal of 349777931 is 139777943.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 349777931 - 2¹⁰ = 349776907 is a prime.

It is a super-2 number, since 2×349777931² = 244689202029281522, which contains 22 as substring.

Together with 349777933, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 349777931.

It is not a weakly prime, because it can be changed into another prime (349777933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174888965 + 174888966.

It is an arithmetic number, because the mean of its divisors is an integer number (174888966).

Almost surely, 2^349777931 is an apocalyptic number.

349777931 is a deficient number, since it is larger than the sum of its proper divisors (1).

349777931 is an equidigital number, since it uses as much as digits as its factorization.

349777931 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 349777931 is about 18702.3509484770. The cubic root of 349777931 is about 704.5807953318.

The spelling of 349777931 in words is "three hundred forty-nine million, seven hundred seventy-seven thousand, nine hundred thirty-one".