779870349 has 56 divisors (see below), whose sum is σ = 1243527960. Its totient is φ = 487928448.

The previous prime is 779870327. The next prime is 779870387. The reversal of 779870349 is 943078977.

It can be written as a sum of positive squares in 4 ways, for example, as 427745124 + 352125225 = 20682^2 + 18765^2 .

It is not a de Polignac number, because 779870349 - 2⁹ = 779869837 is a prime.

It is a super-2 number, since 2×779870349² = 1216395522498763602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 779870295 and 779870304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779870149) 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 55 ways as a sum of consecutive naturals, for example, 781719 + ... + 782715.

Almost surely, 2^779870349 is an apocalyptic number.

It is an amenable number.

779870349 is a deficient number, since it is larger than the sum of its proper divisors (463657611).

779870349 is an equidigital number, since it uses as much as digits as its factorization.

779870349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The square root of 779870349 is about 27926.1588658376. The cubic root of 779870349 is about 920.4654029157.

The spelling of 779870349 in words is "seven hundred seventy-nine million, eight hundred seventy thousand, three hundred forty-nine".