1968197499 has 24 divisors (see below), whose sum is σ = 2925053040. Its totient is φ = 1274367168.

The previous prime is 1968197467. The next prime is 1968197503. The reversal of 1968197499 is 9947918691.

It is not a de Polignac number, because 1968197499 - 2⁵ = 1968197467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1968197449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190437 + ... + 200505.

It is an arithmetic number, because the mean of its divisors is an integer number (121877210).

Almost surely, 2^1968197499 is an apocalyptic number.

1968197499 is a deficient number, since it is larger than the sum of its proper divisors (956855541).

1968197499 is a wasteful number, since it uses less digits than its factorization.

1968197499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10699 (or 10696 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The square root of 1968197499 is about 44364.3719554329. The cubic root of 1968197499 is about 1253.2072303541.

The spelling of 1968197499 in words is "one billion, nine hundred sixty-eight million, one hundred ninety-seven thousand, four hundred ninety-nine".