779385641 has 4 divisors (see below), whose sum is σ = 784167312. Its totient is φ = 774603972.

The previous prime is 779385637. The next prime is 779385647. The reversal of 779385641 is 146583977.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146583977 = 983 ⋅149119.

It is a cyclic number.

It is not a de Polignac number, because 779385641 - 2² = 779385637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 779385641.

It is not an unprimeable number, because it can be changed into a prime (779385647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390591 + ... + 2390916.

It is an arithmetic number, because the mean of its divisors is an integer number (196041828).

Almost surely, 2^779385641 is an apocalyptic number.

It is an amenable number.

779385641 is a deficient number, since it is larger than the sum of its proper divisors (4781671).

779385641 is a wasteful number, since it uses less digits than its factorization.

779385641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781670.

The product of its digits is 1270080, while the sum is 50.

The square root of 779385641 is about 27917.4791304659. The cubic root of 779385641 is about 920.2746663360.

The spelling of 779385641 in words is "seven hundred seventy-nine million, three hundred eighty-five thousand, six hundred forty-one".