84510289 has 2 divisors, whose sum is σ = 84510290. Its totient is φ = 84510288.

The previous prime is 84510287. The next prime is 84510299. The reversal of 84510289 is 98201548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 23357889 = 7820^2 + 4833^2 .

It is a cyclic number.

It is not a de Polignac number, because 84510289 - 2¹ = 84510287 is a prime.

Together with 84510287, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84510287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42255144 + 42255145.

It is an arithmetic number, because the mean of its divisors is an integer number (42255145).

Almost surely, 2^84510289 is an apocalyptic number.

It is an amenable number.

84510289 is a deficient number, since it is larger than the sum of its proper divisors (1).

84510289 is an equidigital number, since it uses as much as digits as its factorization.

84510289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 84510289 is about 9192.9477862109. The cubic root of 84510289 is about 438.8369577348.

The spelling of 84510289 in words is "eighty-four million, five hundred ten thousand, two hundred eighty-nine".