140839 has 2 divisors, whose sum is σ = 140840. Its totient is φ = 140838.

The previous prime is 140837. The next prime is 140863. The reversal of 140839 is 938041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140839 - 2¹ = 140837 is a prime.

Together with 140837, it forms a pair of twin primes.

It is an Ulam number.

140839 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70419 + 70420.

It is an arithmetic number, because the mean of its divisors is an integer number (70420).

2¹⁴⁰⁸³⁹ is an apocalyptic number.

140839 is a deficient number, since it is larger than the sum of its proper divisors (1).

140839 is an equidigital number, since it uses as much as digits as its factorization.

140839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 140839 is about 375.2852248624. The cubic root of 140839 is about 52.0284607513.

It can be divided in two parts, 140 and 839, that added together give a palindrome (979).

The spelling of 140839 in words is "one hundred forty thousand, eight hundred thirty-nine".