1191921696 has 96 divisors (see below), whose sum is σ = 3973092480. Its totient is φ = 340547328.

The previous prime is 1191921691. The next prime is 1191921719. The reversal of 1191921696 is 6961291911.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1191921691) 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, 92491 + ... + 104586.

It is an arithmetic number, because the mean of its divisors is an integer number (41386380).

Almost surely, 2^1191921696 is an apocalyptic number.

1191921696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1191921696 is an abundant number, since it is smaller than the sum of its proper divisors (2781170784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1191921696 is a wasteful number, since it uses less digits than its factorization.

1191921696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197103 (or 197089 counting only the distinct ones).

The product of its digits is 52488, while the sum is 45.

The square root of 1191921696 is about 34524.2189774077. The cubic root of 1191921696 is about 1060.2686206601.

The spelling of 1191921696 in words is "one billion, one hundred ninety-one million, nine hundred twenty-one thousand, six hundred ninety-six".