2000019797 has 2 divisors, whose sum is σ = 2000019798. Its totient is φ = 2000019796.

The previous prime is 2000019787. The next prime is 2000019841. The reversal of 2000019797 is 7979100002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1984346116 + 15673681 = 44546^2 + 3959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000019797 - 2¹² = 2000015701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000019767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000009898 + 1000009899.

It is an arithmetic number, because the mean of its divisors is an integer number (1000009899).

Almost surely, 2^2000019797 is an apocalyptic number.

It is an amenable number.

2000019797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000019797 is an equidigital number, since it uses as much as digits as its factorization.

2000019797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 2000019797 is about 44721.5808866368. The cubic root of 2000019797 is about 1259.9252069907.

Adding to 2000019797 its reverse (7979100002), we get a palindrome (9979119799).

The spelling of 2000019797 in words is "two billion, nineteen thousand, seven hundred ninety-seven".