679653849 has 32 divisors (see below), whose sum is σ = 1047810816. Its totient is φ = 383846400.

The previous prime is 679653839. The next prime is 679653853. The reversal of 679653849 is 948356976.

It is a happy number.

It is not a de Polignac number, because 679653849 - 2⁵ = 679653817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (679653839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 969199 + ... + 969899.

It is an arithmetic number, because the mean of its divisors is an integer number (32744088).

Almost surely, 2^679653849 is an apocalyptic number.

It is an amenable number.

679653849 is a deficient number, since it is larger than the sum of its proper divisors (368156967).

679653849 is a wasteful number, since it uses less digits than its factorization.

679653849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185.

The product of its digits is 9797760, while the sum is 57.

The square root of 679653849 is about 26070.1716334972. The cubic root of 679653849 is about 879.2166966560.

The spelling of 679653849 in words is "six hundred seventy-nine million, six hundred fifty-three thousand, eight hundred forty-nine".