289137973 has 2 divisors, whose sum is σ = 289137974. Its totient is φ = 289137972.

The previous prime is 289137883. The next prime is 289137997. The reversal of 289137973 is 379731982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287879089 + 1258884 = 16967^2 + 1122^2 .

It is a cyclic number.

It is not a de Polignac number, because 289137973 - 2²⁵ = 255583541 is a prime.

It is a super-3 number, since 3×289137973³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289137073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144568986 + 144568987.

It is an arithmetic number, because the mean of its divisors is an integer number (144568987).

Almost surely, 2^289137973 is an apocalyptic number.

It is an amenable number.

289137973 is a deficient number, since it is larger than the sum of its proper divisors (1).

289137973 is an equidigital number, since it uses as much as digits as its factorization.

289137973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 289137973 is about 17004.0575451861. The cubic root of 289137973 is about 661.2540992905.

The spelling of 289137973 in words is "two hundred eighty-nine million, one hundred thirty-seven thousand, nine hundred seventy-three".