1996565869 has 2 divisors, whose sum is σ = 1996565870. Its totient is φ = 1996565868.

The previous prime is 1996565759. The next prime is 1996565927. The reversal of 1996565869 is 9685656991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1555355844 + 441210025 = 39438^2 + 21005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1996565869 is a prime.

It is a super-2 number, since 2×1996565869² = 7972550538511450322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1996565869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1996565269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998282934 + 998282935.

It is an arithmetic number, because the mean of its divisors is an integer number (998282935).

Almost surely, 2^1996565869 is an apocalyptic number.

It is an amenable number.

1996565869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996565869 is an equidigital number, since it uses as much as digits as its factorization.

1996565869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31492800, while the sum is 64.

The square root of 1996565869 is about 44682.9483024565. The cubic root of 1996565869 is about 1259.1995144401.

The spelling of 1996565869 in words is "one billion, nine hundred ninety-six million, five hundred sixty-five thousand, eight hundred sixty-nine".