679435669 has 4 divisors (see below), whose sum is σ = 741202560. Its totient is φ = 617668780.

The previous prime is 679435667. The next prime is 679435721. The reversal of 679435669 is 966534976.

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 679435669 - 2¹ = 679435667 is a prime.

It is a super-2 number, since 2×679435669² = 923265656618955122, 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 (679435661) 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, 30883429 + ... + 30883450.

It is an arithmetic number, because the mean of its divisors is an integer number (185300640).

Almost surely, 2^679435669 is an apocalyptic number.

It is an amenable number.

679435669 is a deficient number, since it is larger than the sum of its proper divisors (61766891).

679435669 is a wasteful number, since it uses less digits than its factorization.

679435669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61766890.

The product of its digits is 7348320, while the sum is 55.

The square root of 679435669 is about 26065.9868219103. The cubic root of 679435669 is about 879.1226056079.

The spelling of 679435669 in words is "six hundred seventy-nine million, four hundred thirty-five thousand, six hundred sixty-nine".