239839949 has 2 divisors, whose sum is σ = 239839950. Its totient is φ = 239839948.

The previous prime is 239839937. The next prime is 239839973. The reversal of 239839949 is 949938932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179077924 + 60762025 = 13382^2 + 7795^2 .

It is a cyclic number.

It is not a de Polignac number, because 239839949 - 2⁴ = 239839933 is a prime.

It is a super-2 number, since 2×239839949² = 115046402272645202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 239839894 and 239839903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239839979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119919974 + 119919975.

It is an arithmetic number, because the mean of its divisors is an integer number (119919975).

Almost surely, 2^239839949 is an apocalyptic number.

It is an amenable number.

239839949 is a deficient number, since it is larger than the sum of its proper divisors (1).

239839949 is an equidigital number, since it uses as much as digits as its factorization.

239839949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 56.

The square root of 239839949 is about 15486.7668995178. The cubic root of 239839949 is about 621.3083272295.

The spelling of 239839949 in words is "two hundred thirty-nine million, eight hundred thirty-nine thousand, nine hundred forty-nine".