345031666909 has 2 divisors, whose sum is σ = 345031666910. Its totient is φ = 345031666908.

The previous prime is 345031666873. The next prime is 345031666979. The reversal of 345031666909 is 909666130543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335623248900 + 9408418009 = 579330^2 + 96997^2 .

It is a cyclic number.

It is not a de Polignac number, because 345031666909 - 2²⁵ = 344998112477 is a prime.

It is a super-2 number, since 2×345031666909² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345031666979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172515833454 + 172515833455.

It is an arithmetic number, because the mean of its divisors is an integer number (172515833455).

Almost surely, 2^345031666909 is an apocalyptic number.

It is an amenable number.

345031666909 is a deficient number, since it is larger than the sum of its proper divisors (1).

345031666909 is an equidigital number, since it uses as much as digits as its factorization.

345031666909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3149280, while the sum is 52.

The spelling of 345031666909 in words is "three hundred forty-five billion, thirty-one million, six hundred sixty-six thousand, nine hundred nine".