345226591 has 2 divisors, whose sum is σ = 345226592. Its totient is φ = 345226590.

The previous prime is 345226529. The next prime is 345226597. The reversal of 345226591 is 195622543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345226591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345226591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345226597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172613295 + 172613296.

It is an arithmetic number, because the mean of its divisors is an integer number (172613296).

Almost surely, 2^345226591 is an apocalyptic number.

345226591 is a deficient number, since it is larger than the sum of its proper divisors (1).

345226591 is an equidigital number, since it uses as much as digits as its factorization.

345226591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 345226591 is about 18580.2742444777. The cubic root of 345226591 is about 701.5114219829.

The spelling of 345226591 in words is "three hundred forty-five million, two hundred twenty-six thousand, five hundred ninety-one".