4219949 has 2 divisors, whose sum is σ = 4219950. Its totient is φ = 4219948.

The previous prime is 4219939. The next prime is 4219951. The reversal of 4219949 is 9499124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3422500 + 797449 = 1850^2 + 893^2 .

It is a cyclic number.

It is not a de Polignac number, because 4219949 - 2⁴ = 4219933 is a prime.

Together with 4219951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4219909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109974 + 2109975.

It is an arithmetic number, because the mean of its divisors is an integer number (2109975).

Almost surely, 2^4219949 is an apocalyptic number.

It is an amenable number.

4219949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4219949 is an equidigital number, since it uses as much as digits as its factorization.

4219949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 4219949 is about 2054.2514451741. The cubic root of 4219949 is about 161.5979079599.

It can be divided in two parts, 42 and 19949, that added together give a palindrome (19991).

The spelling of 4219949 in words is "four million, two hundred nineteen thousand, nine hundred forty-nine".