4387939 has 2 divisors, whose sum is σ = 4387940. Its totient is φ = 4387938.

The previous prime is 4387937. The next prime is 4387969. The reversal of 4387939 is 9397834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4387939 - 2¹ = 4387937 is a prime.

Together with 4387937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4387895 and 4387904.

It is not a weakly prime, because it can be changed into another prime (4387931) 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, 2193969 + 2193970.

It is an arithmetic number, because the mean of its divisors is an integer number (2193970).

Almost surely, 2^4387939 is an apocalyptic number.

4387939 is a deficient number, since it is larger than the sum of its proper divisors (1).

4387939 is an equidigital number, since it uses as much as digits as its factorization.

4387939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 4387939 is about 2094.7407954208. The cubic root of 4387939 is about 163.7143923509.

The spelling of 4387939 in words is "four million, three hundred eighty-seven thousand, nine hundred thirty-nine".