289238023 has 2 divisors, whose sum is σ = 289238024. Its totient is φ = 289238022.

The previous prime is 289238009. The next prime is 289238057. The reversal of 289238023 is 320832982.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 289238023 - 2⁹ = 289237511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289238003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144619011 + 144619012.

It is an arithmetic number, because the mean of its divisors is an integer number (144619012).

Almost surely, 2^289238023 is an apocalyptic number.

289238023 is a deficient number, since it is larger than the sum of its proper divisors (1).

289238023 is an equidigital number, since it uses as much as digits as its factorization.

289238023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 289238023 is about 17006.9992356088. Note that the first 3 decimals coincide. The cubic root of 289238023 is about 661.3303614322.

The spelling of 289238023 in words is "two hundred eighty-nine million, two hundred thirty-eight thousand, twenty-three".