140685831 has 24 divisors (see below), whose sum is σ = 238741776. Its totient is φ = 78704640.

The previous prime is 140685773. The next prime is 140685833. The reversal of 140685831 is 138586041.

140685831 is a `hidden beast` number, since 14 + 0 + 68 + 583 + 1 = 666.

It is not a de Polignac number, because 140685831 - 2⁶ = 140685767 is a prime.

It is a super-2 number, since 2×140685831² = 39585006088321122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140685833) 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 23 ways as a sum of consecutive naturals, for example, 53370 + ... + 55943.

It is an arithmetic number, because the mean of its divisors is an integer number (9947574).

Almost surely, 2^140685831 is an apocalyptic number.

140685831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140685831 is a deficient number, since it is larger than the sum of its proper divisors (98055945).

140685831 is a wasteful number, since it uses less digits than its factorization.

140685831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109343 (or 109340 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 140685831 is about 11861.1058084818. The cubic root of 140685831 is about 520.0959278153.

The spelling of 140685831 in words is "one hundred forty million, six hundred eighty-five thousand, eight hundred thirty-one".