4019969 has 4 divisors (see below), whose sum is σ = 4024020. Its totient is φ = 4015920.

The previous prime is 4019909. The next prime is 4019993. The reversal of 4019969 is 9699104.

4019969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1254400 + 2765569 = 1120^2 + 1663^2 .

It is a cyclic number.

It is not a de Polignac number, because 4019969 - 2⁸ = 4019713 is a prime.

It is a super-2 number, since 2×4019969² = 32320301521922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4019909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (1006005).

Almost surely, 2^4019969 is an apocalyptic number.

It is an amenable number.

4019969 is a deficient number, since it is larger than the sum of its proper divisors (4051).

4019969 is a wasteful number, since it uses less digits than its factorization.

4019969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 4019969 is about 2004.9860348641. The cubic root of 4019969 is about 159.0038235965.

The spelling of 4019969 in words is "four million, nineteen thousand, nine hundred sixty-nine".