681813950 has 24 divisors (see below), whose sum is σ = 1269949968. Its totient is φ = 272343680.

The previous prime is 681813931. The next prime is 681813953. The reversal of 681813950 is 59318186.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 681813898 and 681813907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681813953) 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 11 ways as a sum of consecutive naturals, for example, 27974 + ... + 46326.

It is an arithmetic number, because the mean of its divisors is an integer number (52914582).

Almost surely, 2^681813950 is an apocalyptic number.

681813950 is a deficient number, since it is larger than the sum of its proper divisors (588136018).

681813950 is a wasteful number, since it uses less digits than its factorization.

681813950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19108 (or 19103 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 681813950 is about 26111.5673600801. The cubic root of 681813950 is about 880.1471646097.

The spelling of 681813950 in words is "six hundred eighty-one million, eight hundred thirteen thousand, nine hundred fifty".