140399839 has 2 divisors, whose sum is σ = 140399840. Its totient is φ = 140399838.

The previous prime is 140399801. The next prime is 140399851. The reversal of 140399839 is 938993041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140399839 - 2⁹ = 140399327 is a prime.

It is a super-2 number, since 2×140399839² = 39424229582451842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140399879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70199919 + 70199920.

It is an arithmetic number, because the mean of its divisors is an integer number (70199920).

Almost surely, 2^140399839 is an apocalyptic number.

140399839 is a deficient number, since it is larger than the sum of its proper divisors (1).

140399839 is an equidigital number, since it uses as much as digits as its factorization.

140399839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 140399839 is about 11849.0438010837. The cubic root of 140399839 is about 519.7432645371.

The spelling of 140399839 in words is "one hundred forty million, three hundred ninety-nine thousand, eight hundred thirty-nine".