140986681 has 4 divisors (see below), whose sum is σ = 153803664. Its totient is φ = 128169700.

The previous prime is 140986663. The next prime is 140986691. The reversal of 140986681 is 186689041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140986681 - 2¹⁹ = 140462393 is a prime.

It is a super-2 number, since 2×140986681² = 39754488438791522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140986691) 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, 6408475 + ... + 6408496.

It is an arithmetic number, because the mean of its divisors is an integer number (38450916).

Almost surely, 2^140986681 is an apocalyptic number.

140986681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140986681 is a deficient number, since it is larger than the sum of its proper divisors (12816983).

140986681 is a wasteful number, since it uses less digits than its factorization.

140986681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12816982.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 140986681 is about 11873.7812427213. The cubic root of 140986681 is about 520.4663973831.

The spelling of 140986681 in words is "one hundred forty million, nine hundred eighty-six thousand, six hundred eighty-one".