12019797 has 6 divisors (see below), whose sum is σ = 17361942. Its totient is φ = 8013192.

The previous prime is 12019793. The next prime is 12019801. The reversal of 12019797 is 79791021.

It is an interprime number because it is at equal distance from previous prime (12019793) and next prime (12019801).

It can be written as a sum of positive squares in only one way, i.e., 9326916 + 2692881 = 3054^2 + 1641^2 .

It is not a de Polignac number, because 12019797 - 2² = 12019793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12019793) 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 in 5 ways as a sum of consecutive naturals, for example, 667758 + ... + 667775.

It is an arithmetic number, because the mean of its divisors is an integer number (2893657).

Almost surely, 2^12019797 is an apocalyptic number.

It is an amenable number.

12019797 is a deficient number, since it is larger than the sum of its proper divisors (5342145).

12019797 is a wasteful number, since it uses less digits than its factorization.

12019797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335539 (or 1335536 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 12019797 is about 3466.9578884088. The cubic root of 12019797 is about 229.0686788279.

The spelling of 12019797 in words is "twelve million, nineteen thousand, seven hundred ninety-seven".