289660973 has 4 divisors (see below), whose sum is σ = 331041120. Its totient is φ = 248280828.

The previous prime is 289660967. The next prime is 289661027. The reversal of 289660973 is 379066982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 289660973 - 2⁴ = 289660957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289660933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20690063 + ... + 20690076.

It is an arithmetic number, because the mean of its divisors is an integer number (82760280).

Almost surely, 2^289660973 is an apocalyptic number.

It is an amenable number.

289660973 is a deficient number, since it is larger than the sum of its proper divisors (41380147).

289660973 is an equidigital number, since it uses as much as digits as its factorization.

289660973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41380146.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 289660973 is about 17019.4292795029. The cubic root of 289660973 is about 661.6525567936.

The spelling of 289660973 in words is "two hundred eighty-nine million, six hundred sixty thousand, nine hundred seventy-three".