340679909 has 2 divisors, whose sum is σ = 340679910. Its totient is φ = 340679908.

The previous prime is 340679893. The next prime is 340679929. The reversal of 340679909 is 909976043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246395809 + 94284100 = 15697^2 + 9710^2 .

It is a cyclic number.

It is not a de Polignac number, because 340679909 - 2⁴ = 340679893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340679929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170339954 + 170339955.

It is an arithmetic number, because the mean of its divisors is an integer number (170339955).

Almost surely, 2^340679909 is an apocalyptic number.

It is an amenable number.

340679909 is a deficient number, since it is larger than the sum of its proper divisors (1).

340679909 is an equidigital number, since it uses as much as digits as its factorization.

340679909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 340679909 is about 18457.5163280437. The cubic root of 340679909 is about 698.4181347846.

The spelling of 340679909 in words is "three hundred forty million, six hundred seventy-nine thousand, nine hundred nine".