4189949 has 4 divisors (see below), whose sum is σ = 4334460. Its totient is φ = 4045440.

The previous prime is 4189903. The next prime is 4189951. The reversal of 4189949 is 9499814.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9499814 = 2 ⋅4749907.

It can be written as a sum of positive squares in 2 ways, for example, as 3541924 + 648025 = 1882^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 4189949 - 2⁸ = 4189693 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4189849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72212 + ... + 72269.

It is an arithmetic number, because the mean of its divisors is an integer number (1083615).

Almost surely, 2^4189949 is an apocalyptic number.

It is an amenable number.

4189949 is a deficient number, since it is larger than the sum of its proper divisors (144511).

4189949 is a wasteful number, since it uses less digits than its factorization.

4189949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144510.

The product of its digits is 93312, while the sum is 44.

The square root of 4189949 is about 2046.9364914428. The cubic root of 4189949 is about 161.2140588526.

The spelling of 4189949 in words is "four million, one hundred eighty-nine thousand, nine hundred forty-nine".