346776747137 has 2 divisors, whose sum is σ = 346776747138. Its totient is φ = 346776747136.

The previous prime is 346776747133. The next prime is 346776747139. The reversal of 346776747137 is 731747677643.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309109312576 + 37667434561 = 555976^2 + 194081^2 .

It is a cyclic number.

It is not a de Polignac number, because 346776747137 - 2² = 346776747133 is a prime.

It is a super-2 number, since 2×346776747137² (a number of 24 digits) contains 22 as substring.

Together with 346776747139, 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 346776747137.

It is not a weakly prime, because it can be changed into another prime (346776747133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173388373568 + 173388373569.

It is an arithmetic number, because the mean of its divisors is an integer number (173388373569).

Almost surely, 2^346776747137 is an apocalyptic number.

It is an amenable number.

346776747137 is a deficient number, since it is larger than the sum of its proper divisors (1).

346776747137 is an equidigital number, since it uses as much as digits as its factorization.

346776747137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87127488, while the sum is 62.

The spelling of 346776747137 in words is "three hundred forty-six billion, seven hundred seventy-six million, seven hundred forty-seven thousand, one hundred thirty-seven".