340756457 has 2 divisors, whose sum is σ = 340756458. Its totient is φ = 340756456.

The previous prime is 340756399. The next prime is 340756489. The reversal of 340756457 is 754657043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310605376 + 30151081 = 17624^2 + 5491^2 .

It is a cyclic number.

It is not a de Polignac number, because 340756457 - 2¹² = 340752361 is a prime.

It is a super-2 number, since 2×340756457² = 232229925974385698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340756057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170378228 + 170378229.

It is an arithmetic number, because the mean of its divisors is an integer number (170378229).

Almost surely, 2^340756457 is an apocalyptic number.

It is an amenable number.

340756457 is a deficient number, since it is larger than the sum of its proper divisors (1).

340756457 is an equidigital number, since it uses as much as digits as its factorization.

340756457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 41.

The square root of 340756457 is about 18459.5898383469. The cubic root of 340756457 is about 698.4704404889.

The spelling of 340756457 in words is "three hundred forty million, seven hundred fifty-six thousand, four hundred fifty-seven".