340440839 has 2 divisors, whose sum is σ = 340440840. Its totient is φ = 340440838.

The previous prime is 340440833. The next prime is 340440857. The reversal of 340440839 is 938044043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340440839 - 2⁴ = 340440823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340440799 and 340440808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340440833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170220419 + 170220420.

It is an arithmetic number, because the mean of its divisors is an integer number (170220420).

Almost surely, 2^340440839 is an apocalyptic number.

340440839 is a deficient number, since it is larger than the sum of its proper divisors (1).

340440839 is an equidigital number, since it uses as much as digits as its factorization.

340440839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 340440839 is about 18451.0389680365. The cubic root of 340440839 is about 698.2547263660.

The spelling of 340440839 in words is "three hundred forty million, four hundred forty thousand, eight hundred thirty-nine".