345372691 has 2 divisors, whose sum is σ = 345372692. Its totient is φ = 345372690.

The previous prime is 345372679. The next prime is 345372701. The reversal of 345372691 is 196273543.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345372691 - 2²⁷ = 211154963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345372191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172686345 + 172686346.

It is an arithmetic number, because the mean of its divisors is an integer number (172686346).

Almost surely, 2^345372691 is an apocalyptic number.

345372691 is a deficient number, since it is larger than the sum of its proper divisors (1).

345372691 is an equidigital number, since it uses as much as digits as its factorization.

345372691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 345372691 is about 18584.2054175044. The cubic root of 345372691 is about 701.6103679764.

The spelling of 345372691 in words is "three hundred forty-five million, three hundred seventy-two thousand, six hundred ninety-one".