779669 has 4 divisors (see below), whose sum is σ = 850560. Its totient is φ = 708780.

The previous prime is 779663. The next prime is 779693. The reversal of 779669 is 966977.

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.

It is a cyclic number.

It is not a de Polignac number, because 779669 - 2⁸ = 779413 is a prime.

It is a super-2 number, since 2×779669² = 1215767499122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779663) 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, 35429 + ... + 35450.

It is an arithmetic number, because the mean of its divisors is an integer number (212640).

2⁷⁷⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

779669 is a deficient number, since it is larger than the sum of its proper divisors (70891).

779669 is a wasteful number, since it uses less digits than its factorization.

779669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70890.

The product of its digits is 142884, while the sum is 44.

The square root of 779669 is about 882.9886748991. The cubic root of 779669 is about 92.0386180029.

The spelling of 779669 in words is "seven hundred seventy-nine thousand, six hundred sixty-nine".