240198997 has 2 divisors, whose sum is σ = 240198998. Its totient is φ = 240198996.

The previous prime is 240198983. The next prime is 240199019. The reversal of 240198997 is 799891042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132848676 + 107350321 = 11526^2 + 10361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240198997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240198997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240198697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120099498 + 120099499.

It is an arithmetic number, because the mean of its divisors is an integer number (120099499).

Almost surely, 2^240198997 is an apocalyptic number.

It is an amenable number.

240198997 is a deficient number, since it is larger than the sum of its proper divisors (1).

240198997 is an equidigital number, since it uses as much as digits as its factorization.

240198997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 240198997 is about 15498.3546546077. The cubic root of 240198997 is about 621.6182120599.

The spelling of 240198997 in words is "two hundred forty million, one hundred ninety-eight thousand, nine hundred ninety-seven".