345559957 has 2 divisors, whose sum is σ = 345559958. Its totient is φ = 345559956.

The previous prime is 345559943. The next prime is 345559967. The reversal of 345559957 is 759955543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328370641 + 17189316 = 18121^2 + 4146^2 .

It is a cyclic number.

It is not a de Polignac number, because 345559957 - 2²³ = 337171349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345559927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172779978 + 172779979.

It is an arithmetic number, because the mean of its divisors is an integer number (172779979).

Almost surely, 2^345559957 is an apocalyptic number.

It is an amenable number.

345559957 is a deficient number, since it is larger than the sum of its proper divisors (1).

345559957 is an equidigital number, since it uses as much as digits as its factorization.

345559957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4252500, while the sum is 52.

The square root of 345559957 is about 18589.2430453744. The cubic root of 345559957 is about 701.7371527811.

The spelling of 345559957 in words is "three hundred forty-five million, five hundred fifty-nine thousand, nine hundred fifty-seven".