289415897 has 2 divisors, whose sum is σ = 289415898. Its totient is φ = 289415896.

The previous prime is 289415869. The next prime is 289415921. The reversal of 289415897 is 798514982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210366016 + 79049881 = 14504^2 + 8891^2 .

It is a cyclic number.

It is not a de Polignac number, because 289415897 - 2²⁸ = 20980441 is a prime.

It is a super-2 number, since 2×289415897² = 167523122872629218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289417897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144707948 + 144707949.

It is an arithmetic number, because the mean of its divisors is an integer number (144707949).

Almost surely, 2^289415897 is an apocalyptic number.

It is an amenable number.

289415897 is a deficient number, since it is larger than the sum of its proper divisors (1).

289415897 is an equidigital number, since it uses as much as digits as its factorization.

289415897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 53.

The square root of 289415897 is about 17012.2278670373. The cubic root of 289415897 is about 661.4659007478.

The spelling of 289415897 in words is "two hundred eighty-nine million, four hundred fifteen thousand, eight hundred ninety-seven".