240009391 has 2 divisors, whose sum is σ = 240009392. Its totient is φ = 240009390.

The previous prime is 240009373. The next prime is 240009397. The reversal of 240009391 is 193900042.

It is a happy number.

240009391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240009391 - 2¹³ = 240001199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240009397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120004695 + 120004696.

It is an arithmetic number, because the mean of its divisors is an integer number (120004696).

Almost surely, 2^240009391 is an apocalyptic number.

240009391 is a deficient number, since it is larger than the sum of its proper divisors (1).

240009391 is an equidigital number, since it uses as much as digits as its factorization.

240009391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 240009391 is about 15492.2364750865. The cubic root of 240009391 is about 621.4546066463.

The spelling of 240009391 in words is "two hundred forty million, nine thousand, three hundred ninety-one".