289621893 has 8 divisors (see below), whose sum is σ = 421268256. Its totient is φ = 175528400.

The previous prime is 289621861. The next prime is 289621897. The reversal of 289621893 is 398126982.

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 289621893 - 2⁵ = 289621861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289621897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4388178 + ... + 4388243.

It is an arithmetic number, because the mean of its divisors is an integer number (52658532).

Almost surely, 2^289621893 is an apocalyptic number.

It is an amenable number.

289621893 is a deficient number, since it is larger than the sum of its proper divisors (131646363).

289621893 is a wasteful number, since it uses less digits than its factorization.

289621893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8776435.

The product of its digits is 373248, while the sum is 48.

The square root of 289621893 is about 17018.2811411729. The cubic root of 289621893 is about 661.6227995403.

The spelling of 289621893 in words is "two hundred eighty-nine million, six hundred twenty-one thousand, eight hundred ninety-three".