201095309 has 4 divisors (see below), whose sum is σ = 208029660. Its totient is φ = 194160960.

The previous prime is 201095273. The next prime is 201095311. The reversal of 201095309 is 903590102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37332100 + 163763209 = 6110^2 + 12797^2 .

It is a cyclic number.

It is not a de Polignac number, because 201095309 - 2²⁰ = 200046733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 6934321 = 201095309 / (2 + 0 + 1 + 0 + 9 + 5 + 3 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201095009) 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 in 3 ways as a sum of consecutive naturals, for example, 3467132 + ... + 3467189.

It is an arithmetic number, because the mean of its divisors is an integer number (52007415).

Almost surely, 2^201095309 is an apocalyptic number.

201095309 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

201095309 is a deficient number, since it is larger than the sum of its proper divisors (6934351).

201095309 is an equidigital number, since it uses as much as digits as its factorization.

201095309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6934350.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 201095309 is about 14180.8077696583. The cubic root of 201095309 is about 585.8691723380.

The spelling of 201095309 in words is "two hundred one million, ninety-five thousand, three hundred nine".