140402239 has 2 divisors, whose sum is σ = 140402240. Its totient is φ = 140402238.

The previous prime is 140402233. The next prime is 140402257. The reversal of 140402239 is 932204041.

It is a weak prime.

It is an emirp because it is prime and its reverse (932204041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140402239 - 2³ = 140402231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140402231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70201119 + 70201120.

It is an arithmetic number, because the mean of its divisors is an integer number (70201120).

Almost surely, 2^140402239 is an apocalyptic number.

140402239 is a deficient number, since it is larger than the sum of its proper divisors (1).

140402239 is an equidigital number, since it uses as much as digits as its factorization.

140402239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 140402239 is about 11849.1450746457. The cubic root of 140402239 is about 519.7462260237.

The spelling of 140402239 in words is "one hundred forty million, four hundred two thousand, two hundred thirty-nine".