309041 has 4 divisors (see below), whose sum is σ = 316272. Its totient is φ = 301812.

The previous prime is 309037. The next prime is 309059. The reversal of 309041 is 140903.

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: 140903 = 7 ⋅20129.

It is a cyclic number.

It is not a de Polignac number, because 309041 - 2² = 309037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (309011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551 + ... + 3636.

It is an arithmetic number, because the mean of its divisors is an integer number (79068).

2³⁰⁹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

309041 is a deficient number, since it is larger than the sum of its proper divisors (7231).

309041 is an equidigital number, since it uses as much as digits as its factorization.

309041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 309041 is about 555.9145617809. The cubic root of 309041 is about 67.6091330167.

Adding to 309041 its reverse (140903), we get a palindrome (449944).

The spelling of 309041 in words is "three hundred nine thousand, forty-one".