289993139 has 2 divisors, whose sum is σ = 289993140. Its totient is φ = 289993138.

The previous prime is 289993133. The next prime is 289993169. The reversal of 289993139 is 931399982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289993139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289993133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144996569 + 144996570.

It is an arithmetic number, because the mean of its divisors is an integer number (144996570).

Almost surely, 2^289993139 is an apocalyptic number.

289993139 is a deficient number, since it is larger than the sum of its proper divisors (1).

289993139 is an equidigital number, since it uses as much as digits as its factorization.

289993139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 53.

The square root of 289993139 is about 17029.1849188386. The cubic root of 289993139 is about 661.9053747976.

The spelling of 289993139 in words is "two hundred eighty-nine million, nine hundred ninety-three thousand, one hundred thirty-nine".