84957552209 has 2 divisors, whose sum is σ = 84957552210. Its totient is φ = 84957552208.

The previous prime is 84957552193. The next prime is 84957552217. The reversal of 84957552209 is 90225575948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52305062209 + 32652490000 = 228703^2 + 180700^2 .

It is a cyclic number.

It is not a de Polignac number, because 84957552209 - 2⁴ = 84957552193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84957552269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42478776104 + 42478776105.

It is an arithmetic number, because the mean of its divisors is an integer number (42478776105).

Almost surely, 2^84957552209 is an apocalyptic number.

It is an amenable number.

84957552209 is a deficient number, since it is larger than the sum of its proper divisors (1).

84957552209 is an equidigital number, since it uses as much as digits as its factorization.

84957552209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072000, while the sum is 56.

The spelling of 84957552209 in words is "eighty-four billion, nine hundred fifty-seven million, five hundred fifty-two thousand, two hundred nine".