679723655 has 8 divisors (see below), whose sum is σ = 878412192. Its totient is φ = 501949728.

The previous prime is 679723619. The next prime is 679723679. The reversal of 679723655 is 556327976.

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

It is a cyclic number.

It is not a de Polignac number, because 679723655 - 2⁶ = 679723591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5228579 + ... + 5228708.

It is an arithmetic number, because the mean of its divisors is an integer number (109801524).

Almost surely, 2^679723655 is an apocalyptic number.

679723655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

679723655 is a deficient number, since it is larger than the sum of its proper divisors (198688537).

679723655 is a wasteful number, since it uses less digits than its factorization.

679723655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10457305.

The product of its digits is 2381400, while the sum is 50.

The square root of 679723655 is about 26071.5104088735. The cubic root of 679723655 is about 879.2467965369.

The spelling of 679723655 in words is "six hundred seventy-nine million, seven hundred twenty-three thousand, six hundred fifty-five".