240040291 has 2 divisors, whose sum is σ = 240040292. Its totient is φ = 240040290.

The previous prime is 240040249. The next prime is 240040309. The reversal of 240040291 is 192040042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240040291 - 2¹⁹ = 239516003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240040211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120020145 + 120020146.

It is an arithmetic number, because the mean of its divisors is an integer number (120020146).

Almost surely, 2^240040291 is an apocalyptic number.

240040291 is a deficient number, since it is larger than the sum of its proper divisors (1).

240040291 is an equidigital number, since it uses as much as digits as its factorization.

240040291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 240040291 is about 15493.2337166907. The cubic root of 240040291 is about 621.4812752185.

The spelling of 240040291 in words is "two hundred forty million, forty thousand, two hundred ninety-one".