289909423 has 2 divisors, whose sum is σ = 289909424. Its totient is φ = 289909422.

The previous prime is 289909379. The next prime is 289909439. The reversal of 289909423 is 324909982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 289909423 - 2¹³ = 289901231 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289909463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144954711 + 144954712.

It is an arithmetic number, because the mean of its divisors is an integer number (144954712).

Almost surely, 2^289909423 is an apocalyptic number.

289909423 is a deficient number, since it is larger than the sum of its proper divisors (1).

289909423 is an equidigital number, since it uses as much as digits as its factorization.

289909423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 289909423 is about 17026.7267259447. The cubic root of 289909423 is about 661.8416751257.

The spelling of 289909423 in words is "two hundred eighty-nine million, nine hundred nine thousand, four hundred twenty-three".