340312897 has 2 divisors, whose sum is σ = 340312898. Its totient is φ = 340312896.

The previous prime is 340312873. The next prime is 340312901. The reversal of 340312897 is 798213043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298632961 + 41679936 = 17281^2 + 6456^2 .

It is an emirp because it is prime and its reverse (798213043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340312897 - 2⁷ = 340312769 is a prime.

It is not a weakly prime, because it can be changed into another prime (340312837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170156448 + 170156449.

It is an arithmetic number, because the mean of its divisors is an integer number (170156449).

Almost surely, 2^340312897 is an apocalyptic number.

It is an amenable number.

340312897 is a deficient number, since it is larger than the sum of its proper divisors (1).

340312897 is an equidigital number, since it uses as much as digits as its factorization.

340312897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 340312897 is about 18447.5715746003. The cubic root of 340312897 is about 698.1672444019.

The spelling of 340312897 in words is "three hundred forty million, three hundred twelve thousand, eight hundred ninety-seven".