240815791 has 2 divisors, whose sum is σ = 240815792. Its totient is φ = 240815790.

The previous prime is 240815753. The next prime is 240815801. The reversal of 240815791 is 197518042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240815791 - 2⁹ = 240815279 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240815791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240815191) 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, 120407895 + 120407896.

It is an arithmetic number, because the mean of its divisors is an integer number (120407896).

Almost surely, 2^240815791 is an apocalyptic number.

240815791 is a deficient number, since it is larger than the sum of its proper divisors (1).

240815791 is an equidigital number, since it uses as much as digits as its factorization.

240815791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 240815791 is about 15518.2405897060. The cubic root of 240815791 is about 622.1498305318.

The spelling of 240815791 in words is "two hundred forty million, eight hundred fifteen thousand, seven hundred ninety-one".