19339949 has 2 divisors, whose sum is σ = 19339950. Its totient is φ = 19339948.

The previous prime is 19339933. The next prime is 19340029. The reversal of 19339949 is 94993391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19096900 + 243049 = 4370^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 19339949 - 2⁴ = 19339933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19339909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9669974 + 9669975.

It is an arithmetic number, because the mean of its divisors is an integer number (9669975).

Almost surely, 2^19339949 is an apocalyptic number.

It is an amenable number.

19339949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19339949 is an equidigital number, since it uses as much as digits as its factorization.

19339949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 47.

The square root of 19339949 is about 4397.7208870050. The cubic root of 19339949 is about 268.4222061580.

It can be divided in two parts, 19339 and 949, that multiplied together give a triangular number (18352711 = T₆₀₅₈).

The spelling of 19339949 in words is "nineteen million, three hundred thirty-nine thousand, nine hundred forty-nine".