240840791 has 2 divisors, whose sum is σ = 240840792. Its totient is φ = 240840790.

The previous prime is 240840779. The next prime is 240840799. The reversal of 240840791 is 197048042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240840791 - 2⁶ = 240840727 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240840799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120420395 + 120420396.

It is an arithmetic number, because the mean of its divisors is an integer number (120420396).

Almost surely, 2^240840791 is an apocalyptic number.

240840791 is a deficient number, since it is larger than the sum of its proper divisors (1).

240840791 is an equidigital number, since it uses as much as digits as its factorization.

240840791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 240840791 is about 15519.0460724878. The cubic root of 240840791 is about 622.1713590309.

The spelling of 240840791 in words is "two hundred forty million, eight hundred forty thousand, seven hundred ninety-one".