289023081 has 8 divisors (see below), whose sum is σ = 394326240. Its totient is φ = 188200992.

The previous prime is 289023071. The next prime is 289023107. The reversal of 289023081 is 180320982.

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

It is not a de Polignac number, because 289023081 - 2⁶ = 289023017 is a prime.

It is a super-2 number, since 2×289023081² = 167068682701465122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (289023011) 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, 1120116 + ... + 1120373.

It is an arithmetic number, because the mean of its divisors is an integer number (49290780).

Almost surely, 2^289023081 is an apocalyptic number.

It is an amenable number.

289023081 is a deficient number, since it is larger than the sum of its proper divisors (105303159).

289023081 is a wasteful number, since it uses less digits than its factorization.

289023081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240535.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 289023081 is about 17000.6788393876. The cubic root of 289023081 is about 661.1665022744.

The spelling of 289023081 in words is "two hundred eighty-nine million, twenty-three thousand, eighty-one".