4309939 has 2 divisors, whose sum is σ = 4309940. Its totient is φ = 4309938.

The previous prime is 4309937. The next prime is 4309957. The reversal of 4309939 is 9399034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4309939 - 2¹ = 4309937 is a prime.

Together with 4309937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4309898 and 4309907.

It is not a weakly prime, because it can be changed into another prime (4309937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2154969 + 2154970.

It is an arithmetic number, because the mean of its divisors is an integer number (2154970).

Almost surely, 2^4309939 is an apocalyptic number.

4309939 is a deficient number, since it is larger than the sum of its proper divisors (1).

4309939 is an equidigital number, since it uses as much as digits as its factorization.

4309939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 4309939 is about 2076.0392578176. The cubic root of 4309939 is about 162.7385246624.

It can be divided in two parts, 43099 and 39, that multiplied together give a palindrome (1680861).

The spelling of 4309939 in words is "four million, three hundred nine thousand, nine hundred thirty-nine".