340394251 has 2 divisors, whose sum is σ = 340394252. Its totient is φ = 340394250.

The previous prime is 340394231. The next prime is 340394261. The reversal of 340394251 is 152493043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340394251 - 2¹⁷ = 340263179 is a prime.

It is a super-2 number, since 2×340394251² = 231736492227702002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (340394231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170197125 + 170197126.

It is an arithmetic number, because the mean of its divisors is an integer number (170197126).

Almost surely, 2^340394251 is an apocalyptic number.

340394251 is a deficient number, since it is larger than the sum of its proper divisors (1).

340394251 is an equidigital number, since it uses as much as digits as its factorization.

340394251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 340394251 is about 18449.7764485102. The cubic root of 340394251 is about 698.2228737683. Note that the first 3 decimals are identical.

The spelling of 340394251 in words is "three hundred forty million, three hundred ninety-four thousand, two hundred fifty-one".