11981769 has 8 divisors (see below), whose sum is σ = 16078080. Its totient is φ = 7936656.

The previous prime is 11981743. The next prime is 11981773. The reversal of 11981769 is 96718911.

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

It is not a de Polignac number, because 11981769 - 2¹⁵ = 11949001 is a prime.

It is a super-2 number, since 2×11981769² = 287125576738722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11981769.

It is not an unprimeable number, because it can be changed into a prime (11971769) 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, 12249 + ... + 13190.

It is an arithmetic number, because the mean of its divisors is an integer number (2009760).

Almost surely, 2^11981769 is an apocalyptic number.

It is an amenable number.

11981769 is a deficient number, since it is larger than the sum of its proper divisors (4096311).

11981769 is a wasteful number, since it uses less digits than its factorization.

11981769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25599.

The product of its digits is 27216, while the sum is 42.

The square root of 11981769 is about 3461.4691967429. The cubic root of 11981769 is about 228.8268492727.

The spelling of 11981769 in words is "eleven million, nine hundred eighty-one thousand, seven hundred sixty-nine".