309201 has 4 divisors (see below), whose sum is σ = 412272. Its totient is φ = 206132.

The previous prime is 309193. The next prime is 309223. The reversal of 309201 is 102903.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102903 = 3 ⋅34301.

It is a cyclic number.

It is not a de Polignac number, because 309201 - 2³ = 309193 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 309201.

It is not an unprimeable number, because it can be changed into a prime (309241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51531 + ... + 51536.

It is an arithmetic number, because the mean of its divisors is an integer number (103068).

2³⁰⁹²⁰¹ is an apocalyptic number.

It is an amenable number.

309201 is a deficient number, since it is larger than the sum of its proper divisors (103071).

309201 is a wasteful number, since it uses less digits than its factorization.

309201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103070.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 309201 is about 556.0584501651. The cubic root of 309201 is about 67.6207987773.

The spelling of 309201 in words is "three hundred nine thousand, two hundred one".