779796609421 has 2 divisors, whose sum is σ = 779796609422. Its totient is φ = 779796609420.

The previous prime is 779796609419. The next prime is 779796609461. The reversal of 779796609421 is 124906697977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779443545321 + 353064100 = 882861^2 + 18790^2 .

It is a cyclic number.

It is not a de Polignac number, because 779796609421 - 2¹ = 779796609419 is a prime.

Together with 779796609419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (779796609401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389898304710 + 389898304711.

It is an arithmetic number, because the mean of its divisors is an integer number (389898304711).

Almost surely, 2^779796609421 is an apocalyptic number.

It is an amenable number.

779796609421 is a deficient number, since it is larger than the sum of its proper divisors (1).

779796609421 is an equidigital number, since it uses as much as digits as its factorization.

779796609421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72013536, while the sum is 67.

The spelling of 779796609421 in words is "seven hundred seventy-nine billion, seven hundred ninety-six million, six hundred nine thousand, four hundred twenty-one".