11897967919 has 8 divisors (see below), whose sum is σ = 12416406912. Its totient is φ = 11379623640.

The previous prime is 11897967881. The next prime is 11897967971. The reversal of 11897967919 is 91976979811.

11897967919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11897967919 - 2¹⁵ = 11897935151 is a prime.

It is a super-2 number, since 2×11897967919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11897967019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378724 + ... + 408934.

It is an arithmetic number, because the mean of its divisors is an integer number (1552050864).

Almost surely, 2^11897967919 is an apocalyptic number.

11897967919 is a deficient number, since it is larger than the sum of its proper divisors (518438993).

11897967919 is a wasteful number, since it uses less digits than its factorization.

11897967919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47357.

The product of its digits is 15431472, while the sum is 67.

The spelling of 11897967919 in words is "eleven billion, eight hundred ninety-seven million, nine hundred sixty-seven thousand, nine hundred nineteen".