779431 has 4 divisors (see below), whose sum is σ = 781200. Its totient is φ = 777664.

The previous prime is 779413. The next prime is 779477. The reversal of 779431 is 134977.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 779431 - 2¹¹ = 777383 is a prime.

It is a super-2 number, since 2×779431² = 1215025367522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 779393 and 779402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375 + ... + 1303.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

2⁷⁷⁹⁴³¹ is an apocalyptic number.

779431 is a deficient number, since it is larger than the sum of its proper divisors (1769).

779431 is an equidigital number, since it uses as much as digits as its factorization.

779431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its digits is 5292, while the sum is 31.

The square root of 779431 is about 882.8538950472. The cubic root of 779431 is about 92.0292518828.

The spelling of 779431 in words is "seven hundred seventy-nine thousand, four hundred thirty-one".