309213426239 has 2 divisors, whose sum is σ = 309213426240. Its totient is φ = 309213426238.

The previous prime is 309213426163. The next prime is 309213426271. The reversal of 309213426239 is 932624312903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 309213426239 - 2²⁴ = 309196649023 is a prime.

It is a super-2 number, since 2×309213426239² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 309213426239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309213426439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154606713119 + 154606713120.

It is an arithmetic number, because the mean of its divisors is an integer number (154606713120).

Almost surely, 2^309213426239 is an apocalyptic number.

309213426239 is a deficient number, since it is larger than the sum of its proper divisors (1).

309213426239 is an equidigital number, since it uses as much as digits as its factorization.

309213426239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 309213426239 in words is "three hundred nine billion, two hundred thirteen million, four hundred twenty-six thousand, two hundred thirty-nine".