679740091 has 8 divisors (see below), whose sum is σ = 710073504. Its totient is φ = 649471680.

The previous prime is 679740073. The next prime is 679740097. The reversal of 679740091 is 190047976.

It is a happy number.

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 679740091 - 2⁹ = 679739579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679740097) 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 7 ways as a sum of consecutive naturals, for example, 5781 + ... + 37321.

It is an arithmetic number, because the mean of its divisors is an integer number (88759188).

Almost surely, 2^679740091 is an apocalyptic number.

679740091 is a deficient number, since it is larger than the sum of its proper divisors (30333413).

679740091 is a wasteful number, since it uses less digits than its factorization.

679740091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32501.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 679740091 is about 26071.8256169375. The cubic root of 679740091 is about 879.2538833305.

The spelling of 679740091 in words is "six hundred seventy-nine million, seven hundred forty thousand, ninety-one".