1396700779 has 2 divisors, whose sum is σ = 1396700780. Its totient is φ = 1396700778.

The previous prime is 1396700761. The next prime is 1396700791. The reversal of 1396700779 is 9770076931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1396700779 - 2⁷ = 1396700651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1396700729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698350389 + 698350390.

It is an arithmetic number, because the mean of its divisors is an integer number (698350390).

Almost surely, 2^1396700779 is an apocalyptic number.

1396700779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396700779 is an equidigital number, since it uses as much as digits as its factorization.

1396700779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500094, while the sum is 49.

The square root of 1396700779 is about 37372.4601678830. The cubic root of 1396700779 is about 1117.8094884902.

The spelling of 1396700779 in words is "one billion, three hundred ninety-six million, seven hundred thousand, seven hundred seventy-nine".