345669257 has 2 divisors, whose sum is σ = 345669258. Its totient is φ = 345669256.

The previous prime is 345669239. The next prime is 345669263. The reversal of 345669257 is 752966543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345550921 + 118336 = 18589^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 345669257 - 2¹⁰ = 345668233 is a prime.

It is not a weakly prime, because it can be changed into another prime (345669287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172834628 + 172834629.

It is an arithmetic number, because the mean of its divisors is an integer number (172834629).

Almost surely, 2^345669257 is an apocalyptic number.

It is an amenable number.

345669257 is a deficient number, since it is larger than the sum of its proper divisors (1).

345669257 is an equidigital number, since it uses as much as digits as its factorization.

345669257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 47.

The square root of 345669257 is about 18592.1826852040. The cubic root of 345669257 is about 701.8111310532.

The spelling of 345669257 in words is "three hundred forty-five million, six hundred sixty-nine thousand, two hundred fifty-seven".