289080397 has 2 divisors, whose sum is σ = 289080398. Its totient is φ = 289080396.

The previous prime is 289080313. The next prime is 289080401. The reversal of 289080397 is 793080982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288626121 + 454276 = 16989^2 + 674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289080397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289080097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144540198 + 144540199.

It is an arithmetic number, because the mean of its divisors is an integer number (144540199).

Almost surely, 2^289080397 is an apocalyptic number.

It is an amenable number.

289080397 is a deficient number, since it is larger than the sum of its proper divisors (1).

289080397 is an equidigital number, since it uses as much as digits as its factorization.

289080397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 289080397 is about 17002.3644532165. The cubic root of 289080397 is about 661.2102045678.

The spelling of 289080397 in words is "two hundred eighty-nine million, eighty thousand, three hundred ninety-seven".