240491497 has 2 divisors, whose sum is σ = 240491498. Its totient is φ = 240491496.

The previous prime is 240491491. The next prime is 240491539. The reversal of 240491497 is 794194042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182898576 + 57592921 = 13524^2 + 7589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240491497 is a prime.

It is not a weakly prime, because it can be changed into another prime (240491491) 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, 120245748 + 120245749.

It is an arithmetic number, because the mean of its divisors is an integer number (120245749).

Almost surely, 2^240491497 is an apocalyptic number.

It is an amenable number.

240491497 is a deficient number, since it is larger than the sum of its proper divisors (1).

240491497 is an equidigital number, since it uses as much as digits as its factorization.

240491497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 240491497 is about 15507.7882691246. The cubic root of 240491497 is about 621.8704328916.

The spelling of 240491497 in words is "two hundred forty million, four hundred ninety-one thousand, four hundred ninety-seven".