679791637 has 4 divisors (see below), whose sum is σ = 776904736. Its totient is φ = 582678540.

The previous prime is 679791599. The next prime is 679791659. The reversal of 679791637 is 736197976.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-679791637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679791667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48556539 + ... + 48556552.

It is an arithmetic number, because the mean of its divisors is an integer number (194226184).

Almost surely, 2^679791637 is an apocalyptic number.

It is an amenable number.

679791637 is a deficient number, since it is larger than the sum of its proper divisors (97113099).

679791637 is an equidigital number, since it uses as much as digits as its factorization.

679791637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97113098.

The product of its digits is 3000564, while the sum is 55.

The square root of 679791637 is about 26072.8141365676. The cubic root of 679791637 is about 879.2761079405.

The spelling of 679791637 in words is "six hundred seventy-nine million, seven hundred ninety-one thousand, six hundred thirty-seven".