289888691 has 2 divisors, whose sum is σ = 289888692. Its totient is φ = 289888690.

The previous prime is 289888663. The next prime is 289888723. The reversal of 289888691 is 196888982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289888691 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 289888691.

It is not a weakly prime, because it can be changed into another prime (289888591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144944345 + 144944346.

It is an arithmetic number, because the mean of its divisors is an integer number (144944346).

Almost surely, 2^289888691 is an apocalyptic number.

289888691 is a deficient number, since it is larger than the sum of its proper divisors (1).

289888691 is an equidigital number, since it uses as much as digits as its factorization.

289888691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3981312, while the sum is 59.

The square root of 289888691 is about 17026.1179074973. The cubic root of 289888691 is about 661.8258982110.

The spelling of 289888691 in words is "two hundred eighty-nine million, eight hundred eighty-eight thousand, six hundred ninety-one".