84516109 has 2 divisors, whose sum is σ = 84516110. Its totient is φ = 84516108.

The previous prime is 84516073. The next prime is 84516127. The reversal of 84516109 is 90161548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77387209 + 7128900 = 8797^2 + 2670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84516109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84516709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42258054 + 42258055.

It is an arithmetic number, because the mean of its divisors is an integer number (42258055).

Almost surely, 2^84516109 is an apocalyptic number.

It is an amenable number.

84516109 is a deficient number, since it is larger than the sum of its proper divisors (1).

84516109 is an equidigital number, since it uses as much as digits as its factorization.

84516109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 84516109 is about 9193.2643277565. The cubic root of 84516109 is about 438.8470313503.

The spelling of 84516109 in words is "eighty-four million, five hundred sixteen thousand, one hundred nine".