680951 has 4 divisors (see below), whose sum is σ = 682632. Its totient is φ = 679272.

The previous prime is 680929. The next prime is 680959. The reversal of 680951 is 159086.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680951.

It is not an unprimeable number, because it can be changed into a prime (680959) 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 3 ways as a sum of consecutive naturals, for example, 185 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (170658).

2⁶⁸⁰⁹⁵¹ is an apocalyptic number.

680951 is a deficient number, since it is larger than the sum of its proper divisors (1681).

680951 is an equidigital number, since it uses as much as digits as its factorization.

680951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 680951 is about 825.1975521049. The cubic root of 680951 is about 87.9775683183.

The spelling of 680951 in words is "six hundred eighty thousand, nine hundred fifty-one".