345172757 has 2 divisors, whose sum is σ = 345172758. Its totient is φ = 345172756.

The previous prime is 345172627. The next prime is 345172759. The reversal of 345172757 is 757271543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215531761 + 129640996 = 14681^2 + 11386^2 .

It is a cyclic number.

It is not a de Polignac number, because 345172757 - 2⁸ = 345172501 is a prime.

Together with 345172759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345172759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172586378 + 172586379.

It is an arithmetic number, because the mean of its divisors is an integer number (172586379).

Almost surely, 2^345172757 is an apocalyptic number.

It is an amenable number.

345172757 is a deficient number, since it is larger than the sum of its proper divisors (1).

345172757 is an equidigital number, since it uses as much as digits as its factorization.

345172757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 205800, while the sum is 41.

The square root of 345172757 is about 18578.8255010913. The cubic root of 345172757 is about 701.4749559535.

The spelling of 345172757 in words is "three hundred forty-five million, one hundred seventy-two thousand, seven hundred fifty-seven".