1969811999 has 2 divisors, whose sum is σ = 1969812000. Its totient is φ = 1969811998.

The previous prime is 1969811953. The next prime is 1969812011. The reversal of 1969811999 is 9991189691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1969811999 is a prime.

It is a super-2 number, since 2×1969811999² = 7760318622808752002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1969811299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984905999 + 984906000.

It is an arithmetic number, because the mean of its divisors is an integer number (984906000).

Almost surely, 2^1969811999 is an apocalyptic number.

1969811999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969811999 is an equidigital number, since it uses as much as digits as its factorization.

1969811999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352, while the sum is 62.

The square root of 1969811999 is about 44382.5641327763. The cubic root of 1969811999 is about 1253.5498026979.

The spelling of 1969811999 in words is "one billion, nine hundred sixty-nine million, eight hundred eleven thousand, nine hundred ninety-nine".