140691 has 8 divisors (see below), whose sum is σ = 195840. Its totient is φ = 89672.

The previous prime is 140689. The next prime is 140717. The reversal of 140691 is 196041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140691 - 2¹ = 140689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951 + ... + 1088.

It is an arithmetic number, because the mean of its divisors is an integer number (24480).

2¹⁴⁰⁶⁹¹ is an apocalyptic number.

140691 is a deficient number, since it is larger than the sum of its proper divisors (55149).

140691 is a wasteful number, since it uses less digits than its factorization.

140691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 140691 is about 375.0879896771. The cubic root of 140691 is about 52.0102297428.

The spelling of 140691 in words is "one hundred forty thousand, six hundred ninety-one".