289878293 has 2 divisors, whose sum is σ = 289878294. Its totient is φ = 289878292.

The previous prime is 289878227. The next prime is 289878317. The reversal of 289878293 is 392878982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286218724 + 3659569 = 16918^2 + 1913^2 .

It is a cyclic number.

It is not a de Polignac number, because 289878293 - 2⁸ = 289878037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289878593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144939146 + 144939147.

It is an arithmetic number, because the mean of its divisors is an integer number (144939147).

Almost surely, 2^289878293 is an apocalyptic number.

It is an amenable number.

289878293 is a deficient number, since it is larger than the sum of its proper divisors (1).

289878293 is an equidigital number, since it uses as much as digits as its factorization.

289878293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 56.

The square root of 289878293 is about 17025.8125503601. The cubic root of 289878293 is about 661.8179851186.

The spelling of 289878293 in words is "two hundred eighty-nine million, eight hundred seventy-eight thousand, two hundred ninety-three".