84284989 has 2 divisors, whose sum is σ = 84284990. Its totient is φ = 84284988.

The previous prime is 84284957. The next prime is 84285011. The reversal of 84284989 is 98948248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83868964 + 416025 = 9158^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 84284989 - 2⁵ = 84284957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84284909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42142494 + 42142495.

It is an arithmetic number, because the mean of its divisors is an integer number (42142495).

Almost surely, 2^84284989 is an apocalyptic number.

It is an amenable number.

84284989 is a deficient number, since it is larger than the sum of its proper divisors (1).

84284989 is an equidigital number, since it uses as much as digits as its factorization.

84284989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 52.

The square root of 84284989 is about 9180.6856497758. The cubic root of 84284989 is about 438.4466385645.

The spelling of 84284989 in words is "eighty-four million, two hundred eighty-four thousand, nine hundred eighty-nine".