340688779 has 2 divisors, whose sum is σ = 340688780. Its totient is φ = 340688778.

The previous prime is 340688713. The next prime is 340688783. The reversal of 340688779 is 977886043.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340688779 - 2²⁷ = 206471051 is a prime.

It is not a weakly prime, because it can be changed into another prime (340683779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170344389 + 170344390.

It is an arithmetic number, because the mean of its divisors is an integer number (170344390).

Almost surely, 2^340688779 is an apocalyptic number.

340688779 is a deficient number, since it is larger than the sum of its proper divisors (1).

340688779 is an equidigital number, since it uses as much as digits as its factorization.

340688779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 340688779 is about 18457.7566079955. The cubic root of 340688779 is about 698.4241961098.

The spelling of 340688779 in words is "three hundred forty million, six hundred eighty-eight thousand, seven hundred seventy-nine".