244891993 has 8 divisors (see below), whose sum is σ = 248705856. Its totient is φ = 241088400.

The previous prime is 244891991. The next prime is 244892023. The reversal of 244891993 is 399198442.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 244891993 - 2¹ = 244891991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244891991) 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 in 7 ways as a sum of consecutive naturals, for example, 55455 + ... + 59707.

It is an arithmetic number, because the mean of its divisors is an integer number (31088232).

Almost surely, 2^244891993 is an apocalyptic number.

It is an amenable number.

244891993 is a deficient number, since it is larger than the sum of its proper divisors (3813863).

244891993 is an equidigital number, since it uses as much as digits as its factorization.

244891993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135.

The product of its digits is 559872, while the sum is 49.

The square root of 244891993 is about 15649.0253051109. The cubic root of 244891993 is about 625.6405107294.

The spelling of 244891993 in words is "two hundred forty-four million, eight hundred ninety-one thousand, nine hundred ninety-three".