289122905 has 16 divisors (see below), whose sum is σ = 366559680. Its totient is φ = 218313792.

The previous prime is 289122901. The next prime is 289122907. The reversal of 289122905 is 509221982.

It is a cyclic number.

It is not a de Polignac number, because 289122905 - 2² = 289122901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289122901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20822 + ... + 31808.

It is an arithmetic number, because the mean of its divisors is an integer number (22909980).

Almost surely, 2^289122905 is an apocalyptic number.

It is an amenable number.

289122905 is a deficient number, since it is larger than the sum of its proper divisors (77436775).

289122905 is a wasteful number, since it uses less digits than its factorization.

289122905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11288.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 289122905 is about 17003.6144686946. The cubic root of 289122905 is about 661.2426123295.

The spelling of 289122905 in words is "two hundred eighty-nine million, one hundred twenty-two thousand, nine hundred five".