340646329 has 2 divisors, whose sum is σ = 340646330. Its totient is φ = 340646328.

The previous prime is 340646311. The next prime is 340646381. The reversal of 340646329 is 923646043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249482025 + 91164304 = 15795^2 + 9548^2 .

It is an emirp because it is prime and its reverse (923646043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340646329 - 2⁹ = 340645817 is a prime.

It is a super-2 number, since 2×340646329² = 232079842922352482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (340640329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170323164 + 170323165.

It is an arithmetic number, because the mean of its divisors is an integer number (170323165).

Almost surely, 2^340646329 is an apocalyptic number.

It is an amenable number.

340646329 is a deficient number, since it is larger than the sum of its proper divisors (1).

340646329 is an equidigital number, since it uses as much as digits as its factorization.

340646329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 340646329 is about 18456.6066491108. The cubic root of 340646329 is about 698.3951868982.

The spelling of 340646329 in words is "three hundred forty million, six hundred forty-six thousand, three hundred twenty-nine".