201061409 has 2 divisors, whose sum is σ = 201061410. Its totient is φ = 201061408.

The previous prime is 201061373. The next prime is 201061433. The reversal of 201061409 is 904160102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100560784 + 100500625 = 10028^2 + 10025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201061409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201061709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100530704 + 100530705.

It is an arithmetic number, because the mean of its divisors is an integer number (100530705).

Almost surely, 2^201061409 is an apocalyptic number.

It is an amenable number.

201061409 is a deficient number, since it is larger than the sum of its proper divisors (1).

201061409 is an equidigital number, since it uses as much as digits as its factorization.

201061409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 201061409 is about 14179.6124418124. The cubic root of 201061409 is about 585.8362491747.

The spelling of 201061409 in words is "two hundred one million, sixty-one thousand, four hundred nine".