681967846 has 16 divisors (see below), whose sum is σ = 1170005760. Its totient is φ = 292042440.

The previous prime is 681967823. The next prime is 681967879. The reversal of 681967846 is 648769186.

It is a happy number.

681967846 is a nontrivial binomial coefficient, being equal to C(36932, 2).

It is a congruent number.

It is an unprimeable number.

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, 1 + ... + 36931.

It is an arithmetic number, because the mean of its divisors is an integer number (73125360).

Almost surely, 2^681967846 is an apocalyptic number.

681967846 is the 36931-st triangular number and also the 18466-th hexagonal number.

681967846 is the 12311-st centered nonagonal number.

681967846 is a deficient number, since it is larger than the sum of its proper divisors (488037914).

681967846 is a wasteful number, since it uses less digits than its factorization.

681967846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38259.

The product of its digits is 3483648, while the sum is 55.

The square root of 681967846 is about 26114.5140869977. The cubic root of 681967846 is about 880.2133805904.

The spelling of 681967846 in words is "six hundred eighty-one million, nine hundred sixty-seven thousand, eight hundred forty-six".