1916996191 has 8 divisors (see below), whose sum is σ = 2135764224. Its totient is φ = 1705644120.

The previous prime is 1916996141. The next prime is 1916996209.

1916996191 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1916996191 - 2⁷ = 1916996063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916996101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1853445 + ... + 1854478.

It is an arithmetic number, because the mean of its divisors is an integer number (266970528).

Almost surely, 2^1916996191 is an apocalyptic number.

1916996191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1916996191 is a deficient number, since it is larger than the sum of its proper divisors (218768033).

1916996191 is a wasteful number, since it uses less digits than its factorization.

1916996191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707981.

The product of its digits is 236196, while the sum is 52.

The square root of 1916996191 is about 43783.5150598944. The cubic root of 1916996191 is about 1242.2445020629.

The spelling of 1916996191 in words is "one billion, nine hundred sixteen million, nine hundred ninety-six thousand, one hundred ninety-one".