779949997 has 2 divisors, whose sum is σ = 779949998. Its totient is φ = 779949996.

The previous prime is 779949991. The next prime is 779950013. The reversal of 779949997 is 799949977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 725278761 + 54671236 = 26931^2 + 7394^2 .

It is a cyclic number.

It is not a de Polignac number, because 779949997 - 2⁷ = 779949869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (779949991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389974998 + 389974999.

It is an arithmetic number, because the mean of its divisors is an integer number (389974999).

Almost surely, 2^779949997 is an apocalyptic number.

It is an amenable number.

779949997 is a deficient number, since it is larger than the sum of its proper divisors (1).

779949997 is an equidigital number, since it uses as much as digits as its factorization.

779949997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81015228, while the sum is 70.

The square root of 779949997 is about 27927.5848758893. The cubic root of 779949997 is about 920.4967374971.

The spelling of 779949997 in words is "seven hundred seventy-nine million, nine hundred forty-nine thousand, nine hundred ninety-seven".