240442993 has 4 divisors (see below), whose sum is σ = 274792000. Its totient is φ = 206093988.

The previous prime is 240442957. The next prime is 240442999. The reversal of 240442993 is 399244042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399244042 = 2 ⋅199622021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240442993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240442999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17174493 + ... + 17174506.

It is an arithmetic number, because the mean of its divisors is an integer number (68698000).

Almost surely, 2^240442993 is an apocalyptic number.

It is an amenable number.

240442993 is a deficient number, since it is larger than the sum of its proper divisors (34349007).

240442993 is an equidigital number, since it uses as much as digits as its factorization.

240442993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34349006.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 240442993 is about 15506.2243308937. The cubic root of 240442993 is about 621.8286223606.

The spelling of 240442993 in words is "two hundred forty million, four hundred forty-two thousand, nine hundred ninety-three".