309053 has 4 divisors (see below), whose sum is σ = 319740. Its totient is φ = 298368.

The previous prime is 309037. The next prime is 309059. The reversal of 309053 is 350903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 350903 = 7 ⋅50129.

It can be written as a sum of positive squares in 2 ways, for example, as 76729 + 232324 = 277^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 309053 - 2⁴ = 309037 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309059) 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, 5300 + ... + 5357.

It is an arithmetic number, because the mean of its divisors is an integer number (79935).

2³⁰⁹⁰⁵³ is an apocalyptic number.

It is an amenable number.

309053 is a deficient number, since it is larger than the sum of its proper divisors (10687).

309053 is a wasteful number, since it uses less digits than its factorization.

309053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686.

The product of its (nonzero) digits is 405, while the sum is 20.

The square root of 309053 is about 555.9253547015. The cubic root of 309053 is about 67.6100080884.

Adding to 309053 its reverse (350903), we get a palindrome (659956).

The spelling of 309053 in words is "three hundred nine thousand, fifty-three".