11978369 has 8 divisors (see below), whose sum is σ = 13316352. Its totient is φ = 10699920.

The previous prime is 11978359. The next prime is 11978389. The reversal of 11978369 is 96387911.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11978369 is a prime.

It is a super-2 number, since 2×11978369² = 286962647800322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11978359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14459 + ... + 15264.

It is an arithmetic number, because the mean of its divisors is an integer number (1664544).

Almost surely, 2^11978369 is an apocalyptic number.

It is an amenable number.

11978369 is a deficient number, since it is larger than the sum of its proper divisors (1337983).

11978369 is a wasteful number, since it uses less digits than its factorization.

11978369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29767.

The product of its digits is 81648, while the sum is 44.

The square root of 11978369 is about 3460.9780409589. The cubic root of 11978369 is about 228.8052029173.

The spelling of 11978369 in words is "eleven million, nine hundred seventy-eight thousand, three hundred sixty-nine".