345400457 has 2 divisors, whose sum is σ = 345400458. Its totient is φ = 345400456.

The previous prime is 345400379. The next prime is 345400493. The reversal of 345400457 is 754004543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252682816 + 92717641 = 15896^2 + 9629^2 .

It is a cyclic number.

It is not a de Polignac number, because 345400457 - 2⁸ = 345400201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345400057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172700228 + 172700229.

It is an arithmetic number, because the mean of its divisors is an integer number (172700229).

Almost surely, 2^345400457 is an apocalyptic number.

It is an amenable number.

345400457 is a deficient number, since it is larger than the sum of its proper divisors (1).

345400457 is an equidigital number, since it uses as much as digits as its factorization.

345400457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 345400457 is about 18584.9524346983. The cubic root of 345400457 is about 701.6291693003.

The spelling of 345400457 in words is "three hundred forty-five million, four hundred thousand, four hundred fifty-seven".