772776013 has 2 divisors, whose sum is σ = 772776014. Its totient is φ = 772776012.

The previous prime is 772775989. The next prime is 772776019. The reversal of 772776013 is 310677277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474281284 + 298494729 = 21778^2 + 17277^2 .

It is a cyclic number.

It is not a de Polignac number, because 772776013 - 2⁵ = 772775981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (772776019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386388006 + 386388007.

It is an arithmetic number, because the mean of its divisors is an integer number (386388007).

Almost surely, 2^772776013 is an apocalyptic number.

It is an amenable number.

772776013 is a deficient number, since it is larger than the sum of its proper divisors (1).

772776013 is an equidigital number, since it uses as much as digits as its factorization.

772776013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86436, while the sum is 40.

The square root of 772776013 is about 27798.8491308543. The cubic root of 772776013 is about 917.6657954584.

The spelling of 772776013 in words is "seven hundred seventy-two million, seven hundred seventy-six thousand, thirteen".