340345429 has 2 divisors, whose sum is σ = 340345430. Its totient is φ = 340345428.

The previous prime is 340345417. The next prime is 340345433. The reversal of 340345429 is 924543043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253669329 + 86676100 = 15927^2 + 9310^2 .

It is a cyclic number.

It is not a de Polignac number, because 340345429 - 2¹³ = 340337237 is a prime.

It is a super-2 number, since 2×340345429² = 231670022082388082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 340345394 and 340345403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340345459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170172714 + 170172715.

It is an arithmetic number, because the mean of its divisors is an integer number (170172715).

Almost surely, 2^340345429 is an apocalyptic number.

It is an amenable number.

340345429 is a deficient number, since it is larger than the sum of its proper divisors (1).

340345429 is an equidigital number, since it uses as much as digits as its factorization.

340345429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 340345429 is about 18448.4532956018. The cubic root of 340345429 is about 698.1894906477.

The spelling of 340345429 in words is "three hundred forty million, three hundred forty-five thousand, four hundred twenty-nine".