140168239 has 4 divisors (see below), whose sum is σ = 140592040. Its totient is φ = 139744440.

The previous prime is 140168227. The next prime is 140168291. The reversal of 140168239 is 932861041.

140168239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140168239 is a prime.

It is a super-2 number, since 2×140168239² = 39294270448722242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140168219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211404 + ... + 212065.

It is an arithmetic number, because the mean of its divisors is an integer number (35148010).

Almost surely, 2^140168239 is an apocalyptic number.

140168239 is a deficient number, since it is larger than the sum of its proper divisors (423801).

140168239 is an equidigital number, since it uses as much as digits as its factorization.

140168239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423800.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 140168239 is about 11839.2668269619. The cubic root of 140168239 is about 519.4573221659.

The spelling of 140168239 in words is "one hundred forty million, one hundred sixty-eight thousand, two hundred thirty-nine".