289408097 has 4 divisors (see below), whose sum is σ = 315717936. Its totient is φ = 263098260.

The previous prime is 289408087. The next prime is 289408099. The reversal of 289408097 is 790804982.

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 289408097 - 2⁸ = 289407841 is a prime.

It is a super-2 number, since 2×289408097² = 167514093218322818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289408099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13154903 + ... + 13154924.

It is an arithmetic number, because the mean of its divisors is an integer number (78929484).

Almost surely, 2^289408097 is an apocalyptic number.

It is an amenable number.

289408097 is a deficient number, since it is larger than the sum of its proper divisors (26309839).

289408097 is a wasteful number, since it uses less digits than its factorization.

289408097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26309838.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 289408097 is about 17011.9986186221. The cubic root of 289408097 is about 661.4599583417.

Adding to 289408097 its sum of digits (47), we get a square (289408144 = 17012²).

The spelling of 289408097 in words is "two hundred eighty-nine million, four hundred eight thousand, ninety-seven".