13021000309 has 2 divisors, whose sum is σ = 13021000310. Its totient is φ = 13021000308.

The previous prime is 13021000241. The next prime is 13021000351. The reversal of 13021000309 is 90300012031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11295013284 + 1725987025 = 106278^2 + 41545^2 .

It is a cyclic number.

It is not a de Polignac number, because 13021000309 - 2²³ = 13012611701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13021000379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510500154 + 6510500155.

It is an arithmetic number, because the mean of its divisors is an integer number (6510500155).

Almost surely, 2^13021000309 is an apocalyptic number.

It is an amenable number.

13021000309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13021000309 is an equidigital number, since it uses as much as digits as its factorization.

13021000309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

The spelling of 13021000309 in words is "thirteen billion, twenty-one million, three hundred nine", and thus it is an aban number.