309235472239 has 2 divisors, whose sum is σ = 309235472240. Its totient is φ = 309235472238.

The previous prime is 309235472237. The next prime is 309235472243. The reversal of 309235472239 is 932274532903.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 309235472239 - 2¹ = 309235472237 is a prime.

Together with 309235472237, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 309235472192 and 309235472201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309235472237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154617736119 + 154617736120.

It is an arithmetic number, because the mean of its divisors is an integer number (154617736120).

Almost surely, 2^309235472239 is an apocalyptic number.

309235472239 is a deficient number, since it is larger than the sum of its proper divisors (1).

309235472239 is an equidigital number, since it uses as much as digits as its factorization.

309235472239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 49.

The spelling of 309235472239 in words is "three hundred nine billion, two hundred thirty-five million, four hundred seventy-two thousand, two hundred thirty-nine".