140172839 has 2 divisors, whose sum is σ = 140172840. Its totient is φ = 140172838.

The previous prime is 140172827. The next prime is 140172841. The reversal of 140172839 is 938271041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140172839 is a prime.

Together with 140172841, 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 = 140172799 and 140172808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140172859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70086419 + 70086420.

It is an arithmetic number, because the mean of its divisors is an integer number (70086420).

Almost surely, 2^140172839 is an apocalyptic number.

140172839 is a deficient number, since it is larger than the sum of its proper divisors (1).

140172839 is an equidigital number, since it uses as much as digits as its factorization.

140172839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 140172839 is about 11839.4610941546. The cubic root of 140172839 is about 519.4630045696.

The spelling of 140172839 in words is "one hundred forty million, one hundred seventy-two thousand, eight hundred thirty-nine".