779901013 has 2 divisors, whose sum is σ = 779901014. Its totient is φ = 779901012.

The previous prime is 779900987. The next prime is 779901029. The reversal of 779901013 is 310109977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456548689 + 323352324 = 21367^2 + 17982^2 .

It is an emirp because it is prime and its reverse (310109977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 779901013 - 2²⁹ = 243030101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (779905013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389950506 + 389950507.

It is an arithmetic number, because the mean of its divisors is an integer number (389950507).

Almost surely, 2^779901013 is an apocalyptic number.

It is an amenable number.

779901013 is a deficient number, since it is larger than the sum of its proper divisors (1).

779901013 is an equidigital number, since it uses as much as digits as its factorization.

779901013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 779901013 is about 27926.7078797341. The cubic root of 779901013 is about 920.4774667933.

It can be divided in two parts, 77990 and 1013, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 779901013 in words is "seven hundred seventy-nine million, nine hundred one thousand, thirteen".