241903993 has 4 divisors (see below), whose sum is σ = 250245540. Its totient is φ = 233562448.

The previous prime is 241903973. The next prime is 241904017. The reversal of 241903993 is 399309142.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 399309142 = 2 ⋅199654571.

It can be written as a sum of positive squares in 2 ways, for example, as 139428864 + 102475129 = 11808^2 + 10123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-241903993 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (241903973) 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, 4170730 + ... + 4170787.

It is an arithmetic number, because the mean of its divisors is an integer number (62561385).

Almost surely, 2^241903993 is an apocalyptic number.

It is an amenable number.

241903993 is a deficient number, since it is larger than the sum of its proper divisors (8341547).

241903993 is an equidigital number, since it uses as much as digits as its factorization.

241903993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8341546.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 241903993 is about 15553.2630981412. The cubic root of 241903993 is about 623.0855491523.

The spelling of 241903993 in words is "two hundred forty-one million, nine hundred three thousand, nine hundred ninety-three".