686246079 has 4 divisors (see below), whose sum is σ = 914994776. Its totient is φ = 457497384.

The previous prime is 686246059. The next prime is 686246087. The reversal of 686246079 is 970642686.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 686246079 - 2⁷ = 686245951 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 (686246059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114374344 + ... + 114374349.

It is an arithmetic number, because the mean of its divisors is an integer number (228748694).

Almost surely, 2^686246079 is an apocalyptic number.

686246079 is a deficient number, since it is larger than the sum of its proper divisors (228748697).

686246079 is a wasteful number, since it uses less digits than its factorization.

686246079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228748696.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 686246079 is about 26196.2989561503. The cubic root of 686246079 is about 882.0501781398.

The spelling of 686246079 in words is "six hundred eighty-six million, two hundred forty-six thousand, seventy-nine".