2019964 has 6 divisors (see below), whose sum is σ = 3534944. Its totient is φ = 1009980.

The previous prime is 2019959. The next prime is 2019967. The reversal of 2019964 is 4699102.

It is a happy number.

It is a super-2 number, since 2×2019964² = 8160509122592, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019967) 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, 252492 + ... + 252499.

2^2019964 is an apocalyptic number.

It is an amenable number.

2019964 is a deficient number, since it is larger than the sum of its proper divisors (1514980).

2019964 is a wasteful number, since it uses less digits than its factorization.

2019964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504995 (or 504993 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2019964 is about 1421.2543755430. The cubic root of 2019964 is about 126.4099355273.

The spelling of 2019964 in words is "two million, nineteen thousand, nine hundred sixty-four".