289143493 has 4 divisors (see below), whose sum is σ = 296958220. Its totient is φ = 281328768.

The previous prime is 289143487. The next prime is 289143509. The reversal of 289143493 is 394341982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171138724 + 118004769 = 13082^2 + 10863^2 .

It is a cyclic number.

It is not a de Polignac number, because 289143493 - 2¹⁷ = 289012421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289143433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3907308 + ... + 3907381.

It is an arithmetic number, because the mean of its divisors is an integer number (74239555).

Almost surely, 2^289143493 is an apocalyptic number.

It is an amenable number.

289143493 is a deficient number, since it is larger than the sum of its proper divisors (7814727).

289143493 is an equidigital number, since it uses as much as digits as its factorization.

289143493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7814726.

The product of its digits is 186624, while the sum is 43.

The square root of 289143493 is about 17004.2198586116. The cubic root of 289143493 is about 661.2583073154.

The spelling of 289143493 in words is "two hundred eighty-nine million, one hundred forty-three thousand, four hundred ninety-three".