11897894919 has 8 divisors (see below), whose sum is σ = 16250783472. Its totient is φ = 7738468160.

The previous prime is 11897894909. The next prime is 11897894923. The reversal of 11897894919 is 91949879811.

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 11897894919 - 2¹⁹ = 11897370631 is a prime.

It is a super-2 number, since 2×11897894919² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11897894919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11897894909) 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, 48365304 + ... + 48365549.

It is an arithmetic number, because the mean of its divisors is an integer number (2031347934).

Almost surely, 2^11897894919 is an apocalyptic number.

11897894919 is a deficient number, since it is larger than the sum of its proper divisors (4352888553).

11897894919 is an equidigital number, since it uses as much as digits as its factorization.

11897894919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96730897.

The product of its digits is 11757312, while the sum is 66.

The spelling of 11897894919 in words is "eleven billion, eight hundred ninety-seven million, eight hundred ninety-four thousand, nine hundred nineteen".