240139387 has 2 divisors, whose sum is σ = 240139388. Its totient is φ = 240139386.

The previous prime is 240139373. The next prime is 240139409. The reversal of 240139387 is 783931042.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240139387 is a prime.

It is not a weakly prime, because it can be changed into another prime (240139307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120069693 + 120069694.

It is an arithmetic number, because the mean of its divisors is an integer number (120069694).

Almost surely, 2^240139387 is an apocalyptic number.

240139387 is a deficient number, since it is larger than the sum of its proper divisors (1).

240139387 is an equidigital number, since it uses as much as digits as its factorization.

240139387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 240139387 is about 15496.4314279127. The cubic root of 240139387 is about 621.5667856346.

The spelling of 240139387 in words is "two hundred forty million, one hundred thirty-nine thousand, three hundred eighty-seven".