697769979779 has 2 divisors, whose sum is σ = 697769979780. Its totient is φ = 697769979778.

The previous prime is 697769979773. The next prime is 697769979791. The reversal of 697769979779 is 977979967796.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697769979779 is a prime.

It is not a weakly prime, because it can be changed into another prime (697769979773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348884989889 + 348884989890.

It is an arithmetic number, because the mean of its divisors is an integer number (348884989890).

Almost surely, 2^697769979779 is an apocalyptic number.

697769979779 is a deficient number, since it is larger than the sum of its proper divisors (1).

697769979779 is an equidigital number, since it uses as much as digits as its factorization.

697769979779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35727715548, while the sum is 92.

The spelling of 697769979779 in words is "six hundred ninety-seven billion, seven hundred sixty-nine million, nine hundred seventy-nine thousand, seven hundred seventy-nine".