140840039 has 2 divisors, whose sum is σ = 140840040. Its totient is φ = 140840038.

The previous prime is 140839991. The next prime is 140840041. The reversal of 140840039 is 930048041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140840039 is a prime.

Together with 140840041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 140839993 and 140840020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140840839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70420019 + 70420020.

It is an arithmetic number, because the mean of its divisors is an integer number (70420020).

Almost surely, 2^140840039 is an apocalyptic number.

140840039 is a deficient number, since it is larger than the sum of its proper divisors (1).

140840039 is an equidigital number, since it uses as much as digits as its factorization.

140840039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 140840039 is about 11867.6046024461. The cubic root of 140840039 is about 520.2858869277.

The spelling of 140840039 in words is "one hundred forty million, eight hundred forty thousand, thirty-nine".