345772879 has 2 divisors, whose sum is σ = 345772880. Its totient is φ = 345772878.

The previous prime is 345772813. The next prime is 345772883. The reversal of 345772879 is 978277543.

It is a strong prime.

It is an emirp because it is prime and its reverse (978277543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345772879 - 2²⁷ = 211555151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345772079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172886439 + 172886440.

It is an arithmetic number, because the mean of its divisors is an integer number (172886440).

Almost surely, 2^345772879 is an apocalyptic number.

345772879 is a deficient number, since it is larger than the sum of its proper divisors (1).

345772879 is an equidigital number, since it uses as much as digits as its factorization.

345772879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 52.

The square root of 345772879 is about 18594.9691852393. The cubic root of 345772879 is about 701.8812518464.

The spelling of 345772879 in words is "three hundred forty-five million, seven hundred seventy-two thousand, eight hundred seventy-nine".