240404491 has 2 divisors, whose sum is σ = 240404492. Its totient is φ = 240404490.

The previous prime is 240404471. The next prime is 240404513. The reversal of 240404491 is 194404042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240404491 - 2⁵ = 240404459 is a prime.

It is not a weakly prime, because it can be changed into another prime (240404401) 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, 120202245 + 120202246.

It is an arithmetic number, because the mean of its divisors is an integer number (120202246).

Almost surely, 2^240404491 is an apocalyptic number.

240404491 is a deficient number, since it is larger than the sum of its proper divisors (1).

240404491 is an equidigital number, since it uses as much as digits as its factorization.

240404491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 240404491 is about 15504.9827797389. The cubic root of 240404491 is about 621.7954295674.

The spelling of 240404491 in words is "two hundred forty million, four hundred four thousand, four hundred ninety-one".