309864349133 has 2 divisors, whose sum is σ = 309864349134. Its totient is φ = 309864349132.

The previous prime is 309864349129. The next prime is 309864349147. The reversal of 309864349133 is 331943468903.

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., 268818399529 + 41045949604 = 518477^2 + 202598^2 .

It is an emirp because it is prime and its reverse (331943468903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 309864349133 - 2² = 309864349129 is a prime.

It is a super-3 number, since 3×309864349133³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309864349433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154932174566 + 154932174567.

It is an arithmetic number, because the mean of its divisors is an integer number (154932174567).

Almost surely, 2^309864349133 is an apocalyptic number.

It is an amenable number.

309864349133 is a deficient number, since it is larger than the sum of its proper divisors (1).

309864349133 is an equidigital number, since it uses as much as digits as its factorization.

309864349133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 53.

The spelling of 309864349133 in words is "three hundred nine billion, eight hundred sixty-four million, three hundred forty-nine thousand, one hundred thirty-three".