309941039 has 2 divisors, whose sum is σ = 309941040. Its totient is φ = 309941038.

The previous prime is 309940933. The next prime is 309941041. The reversal of 309941039 is 930149903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 309941039 - 2²⁴ = 293163823 is a prime.

Together with 309941041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 309940993 and 309941011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309941839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154970519 + 154970520.

It is an arithmetic number, because the mean of its divisors is an integer number (154970520).

Almost surely, 2^309941039 is an apocalyptic number.

309941039 is a deficient number, since it is larger than the sum of its proper divisors (1).

309941039 is an equidigital number, since it uses as much as digits as its factorization.

309941039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 309941039 is about 17605.1424021506. The cubic root of 309941039 is about 676.7470347353.

The spelling of 309941039 in words is "three hundred nine million, nine hundred forty-one thousand, thirty-nine".