289329427 has 2 divisors, whose sum is σ = 289329428. Its totient is φ = 289329426.

The previous prime is 289329421. The next prime is 289329437. The reversal of 289329427 is 724923982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 289329427 - 2³ = 289329419 is a prime.

It is not a weakly prime, because it can be changed into another prime (289329421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144664713 + 144664714.

It is an arithmetic number, because the mean of its divisors is an integer number (144664714).

Almost surely, 2^289329427 is an apocalyptic number.

289329427 is a deficient number, since it is larger than the sum of its proper divisors (1).

289329427 is an equidigital number, since it uses as much as digits as its factorization.

289329427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 289329427 is about 17009.6862698875. The cubic root of 289329427 is about 661.4000178733.

The spelling of 289329427 in words is "two hundred eighty-nine million, three hundred twenty-nine thousand, four hundred twenty-seven".