289391893 has 12 divisors (see below), whose sum is σ = 337549440. Its totient is φ = 247379832.

The previous prime is 289391887. The next prime is 289391897. The reversal of 289391893 is 398193982.

It is a de Polignac number, because none of the positive numbers 2^k-289391893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 289391893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289391897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10780 + ... + 26362.

It is an arithmetic number, because the mean of its divisors is an integer number (28129120).

Almost surely, 2^289391893 is an apocalyptic number.

It is an amenable number.

289391893 is a deficient number, since it is larger than the sum of its proper divisors (48157547).

289391893 is a wasteful number, since it uses less digits than its factorization.

289391893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15976 (or 15969 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 289391893 is about 17011.5223598595. The cubic root of 289391893 is about 661.4476130327.

The spelling of 289391893 in words is "two hundred eighty-nine million, three hundred ninety-one thousand, eight hundred ninety-three".