201146609 has 8 divisors (see below), whose sum is σ = 204430920. Its totient is φ = 197876736.

The previous prime is 201146587. The next prime is 201146611. The reversal of 201146609 is 906641102.

It can be written as a sum of positive squares in 4 ways, for example, as 78712384 + 122434225 = 8872^2 + 11065^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201146609 - 2⁸ = 201146353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201146629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26489 + ... + 33225.

It is an arithmetic number, because the mean of its divisors is an integer number (25553865).

Almost surely, 2^201146609 is an apocalyptic number.

It is an amenable number.

201146609 is a deficient number, since it is larger than the sum of its proper divisors (3284311).

201146609 is an equidigital number, since it uses as much as digits as its factorization.

201146609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 201146609 is about 14182.6164370330. The cubic root of 201146609 is about 585.9189870806.

The spelling of 201146609 in words is "two hundred one million, one hundred forty-six thousand, six hundred nine".