201084409 has 2 divisors, whose sum is σ = 201084410. Its totient is φ = 201084408.

The previous prime is 201084407. The next prime is 201084427. The reversal of 201084409 is 904480102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140944384 + 60140025 = 11872^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 201084409 - 2¹ = 201084407 is a prime.

Together with 201084407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201084407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100542204 + 100542205.

It is an arithmetic number, because the mean of its divisors is an integer number (100542205).

Almost surely, 2^201084409 is an apocalyptic number.

It is an amenable number.

201084409 is a deficient number, since it is larger than the sum of its proper divisors (1).

201084409 is an equidigital number, since it uses as much as digits as its factorization.

201084409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 201084409 is about 14180.4234421966. The cubic root of 201084409 is about 585.8585868277.

The spelling of 201084409 in words is "two hundred one million, eighty-four thousand, four hundred nine".