240196991 has 2 divisors, whose sum is σ = 240196992. Its totient is φ = 240196990.

The previous prime is 240196987. The next prime is 240197003. The reversal of 240196991 is 199691042.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240196991 - 2² = 240196987 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240196391) 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, 120098495 + 120098496.

It is an arithmetic number, because the mean of its divisors is an integer number (120098496).

Almost surely, 2^240196991 is an apocalyptic number.

240196991 is a deficient number, since it is larger than the sum of its proper divisors (1).

240196991 is an equidigital number, since it uses as much as digits as its factorization.

240196991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 240196991 is about 15498.2899379254. The cubic root of 240196991 is about 621.6164815925.

The spelling of 240196991 in words is "two hundred forty million, one hundred ninety-six thousand, nine hundred ninety-one".