40115239 has 2 divisors, whose sum is σ = 40115240. Its totient is φ = 40115238.

The previous prime is 40115219. The next prime is 40115249. The reversal of 40115239 is 93251104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40115239 - 2⁹ = 40114727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40115219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20057619 + 20057620.

It is an arithmetic number, because the mean of its divisors is an integer number (20057620).

Almost surely, 2^40115239 is an apocalyptic number.

40115239 is a deficient number, since it is larger than the sum of its proper divisors (1).

40115239 is an equidigital number, since it uses as much as digits as its factorization.

40115239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 40115239 is about 6333.6592109143. The cubic root of 40115239 is about 342.3233009732.

The spelling of 40115239 in words is "forty million, one hundred fifteen thousand, two hundred thirty-nine".