309875053 has 2 divisors, whose sum is σ = 309875054. Its totient is φ = 309875052.

The previous prime is 309875029. The next prime is 309875081. The reversal of 309875053 is 350578903.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204976489 + 104898564 = 14317^2 + 10242^2 .

It is a cyclic number.

It is not a de Polignac number, because 309875053 - 2¹³ = 309866861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 309874997 and 309875015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309875003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154937526 + 154937527.

It is an arithmetic number, because the mean of its divisors is an integer number (154937527).

Almost surely, 2^309875053 is an apocalyptic number.

It is an amenable number.

309875053 is a deficient number, since it is larger than the sum of its proper divisors (1).

309875053 is an equidigital number, since it uses as much as digits as its factorization.

309875053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 309875053 is about 17603.2682476863. The cubic root of 309875053 is about 676.6990051709.

The spelling of 309875053 in words is "three hundred nine million, eight hundred seventy-five thousand, fifty-three".