240981791 has 4 divisors (see below), whose sum is σ = 241178784. Its totient is φ = 240784800.

The previous prime is 240981751. The next prime is 240981803. The reversal of 240981791 is 197189042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240981791 - 2²⁶ = 173872927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240981701) 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 in 3 ways as a sum of consecutive naturals, for example, 96650 + ... + 99111.

It is an arithmetic number, because the mean of its divisors is an integer number (60294696).

Almost surely, 2^240981791 is an apocalyptic number.

240981791 is a deficient number, since it is larger than the sum of its proper divisors (196993).

240981791 is a wasteful number, since it uses less digits than its factorization.

240981791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196992.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 240981791 is about 15523.5882127812. The cubic root of 240981791 is about 622.2927518773.

The spelling of 240981791 in words is "two hundred forty million, nine hundred eighty-one thousand, seven hundred ninety-one".