768990613 has 2 divisors, whose sum is σ = 768990614. Its totient is φ = 768990612.

The previous prime is 768990559. The next prime is 768990653. The reversal of 768990613 is 316099867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667343889 + 101646724 = 25833^2 + 10082^2 .

It is a cyclic number.

It is not a de Polignac number, because 768990613 - 2²¹ = 766893461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768990653) 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, 384495306 + 384495307.

It is an arithmetic number, because the mean of its divisors is an integer number (384495307).

Almost surely, 2^768990613 is an apocalyptic number.

It is an amenable number.

768990613 is a deficient number, since it is larger than the sum of its proper divisors (1).

768990613 is an equidigital number, since it uses as much as digits as its factorization.

768990613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 768990613 is about 27730.6799952688. The cubic root of 768990613 is about 916.1649640444.

The spelling of 768990613 in words is "seven hundred sixty-eight million, nine hundred ninety thousand, six hundred thirteen".