309103013 has 8 divisors (see below), whose sum is σ = 314294232. Its totient is φ = 303952896.

The previous prime is 309103007. The next prime is 309103019. The reversal of 309103013 is 310301903.

It is an interprime number because it is at equal distance from previous prime (309103007) and next prime (309103019).

It can be written as a sum of positive squares in 4 ways, for example, as 18809569 + 290293444 = 4337^2 + 17038^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 309103013 - 2⁸ = 309102757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309103019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5081 + ... + 25377.

It is an arithmetic number, because the mean of its divisors is an integer number (39286779).

Almost surely, 2^309103013 is an apocalyptic number.

It is an amenable number.

309103013 is a deficient number, since it is larger than the sum of its proper divisors (5191219).

309103013 is a wasteful number, since it uses less digits than its factorization.

309103013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20551.

The product of its (nonzero) digits is 243, while the sum is 20.

The square root of 309103013 is about 17581.3256894922. The cubic root of 309103013 is about 676.1365492455.

Adding to 309103013 its reverse (310301903), we get a palindrome (619404916).

The spelling of 309103013 in words is "three hundred nine million, one hundred three thousand, thirteen".