1968965199 has 16 divisors (see below), whose sum is σ = 2918440800. Its totient is φ = 1311988608.

The previous prime is 1968965197. The next prime is 1968965303. The reversal of 1968965199 is 9915698691.

It is a happy number.

It is not a de Polignac number, because 1968965199 - 2¹ = 1968965197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968965197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40357 + ... + 74609.

It is an arithmetic number, because the mean of its divisors is an integer number (182402550).

Almost surely, 2^1968965199 is an apocalyptic number.

1968965199 is a deficient number, since it is larger than the sum of its proper divisors (949475601).

1968965199 is a wasteful number, since it uses less digits than its factorization.

1968965199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36391 (or 36385 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 63.

The square root of 1968965199 is about 44373.0233249888. The cubic root of 1968965199 is about 1253.3701479695.

The spelling of 1968965199 in words is "one billion, nine hundred sixty-eight million, nine hundred sixty-five thousand, one hundred ninety-nine".