11917969 has 8 divisors (see below), whose sum is σ = 14421888. Its totient is φ = 9614400.

The previous prime is 11917967. The next prime is 11917973. The reversal of 11917969 is 96971911.

It is a happy number.

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 11917969 - 2¹ = 11917967 is a prime.

It is a super-2 number, since 2×11917969² = 284075970169922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11917963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49957 + ... + 50194.

It is an arithmetic number, because the mean of its divisors is an integer number (1802736).

Almost surely, 2^11917969 is an apocalyptic number.

It is an amenable number.

11917969 is a deficient number, since it is larger than the sum of its proper divisors (2503919).

11917969 is a wasteful number, since it uses less digits than its factorization.

11917969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100175.

The product of its digits is 30618, while the sum is 43.

The square root of 11917969 is about 3452.2411561187. The cubic root of 11917969 is about 228.4199771817.

The spelling of 11917969 in words is "eleven million, nine hundred seventeen thousand, nine hundred sixty-nine".