345386257 has 2 divisors, whose sum is σ = 345386258. Its totient is φ = 345386256.

The previous prime is 345386243. The next prime is 345386267. The reversal of 345386257 is 752683543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205176976 + 140209281 = 14324^2 + 11841^2 .

It is a cyclic number.

It is not a de Polignac number, because 345386257 - 2¹⁹ = 344861969 is a prime.

It is not a weakly prime, because it can be changed into another prime (345386267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172693128 + 172693129.

It is an arithmetic number, because the mean of its divisors is an integer number (172693129).

Almost surely, 2^345386257 is an apocalyptic number.

It is an amenable number.

345386257 is a deficient number, since it is larger than the sum of its proper divisors (1).

345386257 is an equidigital number, since it uses as much as digits as its factorization.

345386257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

The square root of 345386257 is about 18584.5704012764. The cubic root of 345386257 is about 701.6195541125.

The spelling of 345386257 in words is "three hundred forty-five million, three hundred eighty-six thousand, two hundred fifty-seven".