84044150909 has 2 divisors, whose sum is σ = 84044150910. Its totient is φ = 84044150908.

The previous prime is 84044150887. The next prime is 84044150917. The reversal of 84044150909 is 90905144048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68331528409 + 15712622500 = 261403^2 + 125350^2 .

It is a cyclic number.

It is not a de Polignac number, because 84044150909 - 2²⁰ = 84043102333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84044150909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84044150929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42022075454 + 42022075455.

It is an arithmetic number, because the mean of its divisors is an integer number (42022075455).

Almost surely, 2^84044150909 is an apocalyptic number.

It is an amenable number.

84044150909 is a deficient number, since it is larger than the sum of its proper divisors (1).

84044150909 is an equidigital number, since it uses as much as digits as its factorization.

84044150909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 84044150909 in words is "eighty-four billion, forty-four million, one hundred fifty thousand, nine hundred nine".