679609091 has 8 divisors (see below), whose sum is σ = 776968800. Its totient is φ = 582317568.

The previous prime is 679609087. The next prime is 679609093. The reversal of 679609091 is 190906976.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 679609091 - 2² = 679609087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679609093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6485 + ... + 37433.

It is an arithmetic number, because the mean of its divisors is an integer number (97121100).

Almost surely, 2^679609091 is an apocalyptic number.

679609091 is a deficient number, since it is larger than the sum of its proper divisors (97359709).

679609091 is a wasteful number, since it uses less digits than its factorization.

679609091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34093.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 679609091 is about 26069.3132053762. The cubic root of 679609091 is about 879.1973962211.

The spelling of 679609091 in words is "six hundred seventy-nine million, six hundred nine thousand, ninety-one".