289648087 has 2 divisors, whose sum is σ = 289648088. Its totient is φ = 289648086.

The previous prime is 289648081. The next prime is 289648133. The reversal of 289648087 is 780846982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 289648087 - 2⁷ = 289647959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289648081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144824043 + 144824044.

It is an arithmetic number, because the mean of its divisors is an integer number (144824044).

Almost surely, 2^289648087 is an apocalyptic number.

289648087 is a deficient number, since it is larger than the sum of its proper divisors (1).

289648087 is an equidigital number, since it uses as much as digits as its factorization.

289648087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The square root of 289648087 is about 17019.0507079567. The cubic root of 289648087 is about 661.6427451148.

The spelling of 289648087 in words is "two hundred eighty-nine million, six hundred forty-eight thousand, eighty-seven".