345815117 has 2 divisors, whose sum is σ = 345815118. Its totient is φ = 345815116.

The previous prime is 345815077. The next prime is 345815203. The reversal of 345815117 is 711518543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345550921 + 264196 = 18589^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 345815117 - 2¹⁰ = 345814093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345815317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172907558 + 172907559.

It is an arithmetic number, because the mean of its divisors is an integer number (172907559).

Almost surely, 2^345815117 is an apocalyptic number.

It is an amenable number.

345815117 is a deficient number, since it is larger than the sum of its proper divisors (1).

345815117 is an equidigital number, since it uses as much as digits as its factorization.

345815117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 35.

The square root of 345815117 is about 18596.1048878522. The cubic root of 345815117 is about 701.9098301946.

The spelling of 345815117 in words is "three hundred forty-five million, eight hundred fifteen thousand, one hundred seventeen".