12019939 has 4 divisors (see below), whose sum is σ = 12030480. Its totient is φ = 12009400.

The previous prime is 12019937. The next prime is 12019957. The reversal of 12019939 is 93991021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 93991021 = 269 ⋅349409.

It is a cyclic number.

It is not a de Polignac number, because 12019939 - 2¹ = 12019937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12019933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3319 + ... + 5920.

It is an arithmetic number, because the mean of its divisors is an integer number (3007620).

Almost surely, 2^12019939 is an apocalyptic number.

12019939 is a deficient number, since it is larger than the sum of its proper divisors (10541).

12019939 is an equidigital number, since it uses as much as digits as its factorization.

12019939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10540.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 12019939 is about 3466.9783673972. The cubic root of 12019939 is about 229.0695808849.

The spelling of 12019939 in words is "twelve million, nineteen thousand, nine hundred thirty-nine".