201601109 has 8 divisors (see below), whose sum is σ = 204545880. Its totient is φ = 198671616.

The previous prime is 201601097. The next prime is 201601121. The reversal of 201601109 is 901106102.

It is an interprime number because it is at equal distance from previous prime (201601097) and next prime (201601121).

It can be written as a sum of positive squares in 4 ways, for example, as 386884 + 201214225 = 622^2 + 14185^2 .

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 201601109 - 2²⁰ = 200552533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201601159) 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, 24239 + ... + 31475.

It is an arithmetic number, because the mean of its divisors is an integer number (25568235).

Almost surely, 2^201601109 is an apocalyptic number.

It is an amenable number.

201601109 is a deficient number, since it is larger than the sum of its proper divisors (2944771).

201601109 is an equidigital number, since it uses as much as digits as its factorization.

201601109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 201601109 is about 14198.6305325549. The cubic root of 201601109 is about 586.3599587345.

The spelling of 201601109 in words is "two hundred one million, six hundred one thousand, one hundred nine".