345968591 has 2 divisors, whose sum is σ = 345968592. Its totient is φ = 345968590.

The previous prime is 345968563. The next prime is 345968617. The reversal of 345968591 is 195869543.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345968591 - 2¹⁴ = 345952207 is a prime.

It is a super-3 number, since 3×345968591³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345967591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172984295 + 172984296.

It is an arithmetic number, because the mean of its divisors is an integer number (172984296).

Almost surely, 2^345968591 is an apocalyptic number.

345968591 is a deficient number, since it is larger than the sum of its proper divisors (1).

345968591 is an equidigital number, since it uses as much as digits as its factorization.

345968591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 50.

The square root of 345968591 is about 18600.2309394265. The cubic root of 345968591 is about 702.0136515447.

The spelling of 345968591 in words is "three hundred forty-five million, nine hundred sixty-eight thousand, five hundred ninety-one".