289973993 has 8 divisors (see below), whose sum is σ = 291441600. Its totient is φ = 288510768.

The previous prime is 289973989. The next prime is 289974001. The reversal of 289973993 is 399379982.

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 289973993 - 2² = 289973989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (289973963) 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, 264755 + ... + 265847.

It is an arithmetic number, because the mean of its divisors is an integer number (36430200).

Almost surely, 2^289973993 is an apocalyptic number.

It is an amenable number.

289973993 is a deficient number, since it is larger than the sum of its proper divisors (1467607).

289973993 is a wasteful number, since it uses less digits than its factorization.

289973993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191.

The product of its digits is 6613488, while the sum is 59.

The square root of 289973993 is about 17028.6227569936. The cubic root of 289973993 is about 661.8908076492.

The spelling of 289973993 in words is "two hundred eighty-nine million, nine hundred seventy-three thousand, nine hundred ninety-three".