4279939 has 2 divisors, whose sum is σ = 4279940. Its totient is φ = 4279938.

The previous prime is 4279897. The next prime is 4279963. The reversal of 4279939 is 9399724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4279939 - 2¹⁹ = 3755651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4279895 and 4279904.

It is not a weakly prime, because it can be changed into another prime (4279969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139969 + 2139970.

It is an arithmetic number, because the mean of its divisors is an integer number (2139970).

Almost surely, 2^4279939 is an apocalyptic number.

4279939 is a deficient number, since it is larger than the sum of its proper divisors (1).

4279939 is an equidigital number, since it uses as much as digits as its factorization.

4279939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 4279939 is about 2068.8013437737. The cubic root of 4279939 is about 162.3600562419.

It can be divided in two parts, 4 and 279939, that multiplied together give a triangular number (1119756 = T₁₄₉₆).

The spelling of 4279939 in words is "four million, two hundred seventy-nine thousand, nine hundred thirty-nine".