11479781 has 8 divisors (see below), whose sum is σ = 12149280. Its totient is φ = 10816848.

The previous prime is 11479759. The next prime is 11479789. The reversal of 11479781 is 18797411.

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 11479781 - 2⁶ = 11479717 is a prime.

It is a super-2 number, since 2×11479781² = 263570743615922, which 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 (11479789) 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, 2210 + ... + 5276.

It is an arithmetic number, because the mean of its divisors is an integer number (1518660).

Almost surely, 2^11479781 is an apocalyptic number.

It is an amenable number.

11479781 is a deficient number, since it is larger than the sum of its proper divisors (669499).

11479781 is a wasteful number, since it uses less digits than its factorization.

11479781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283.

The product of its digits is 14112, while the sum is 38.

The square root of 11479781 is about 3388.1825511622. The cubic root of 11479781 is about 225.5855104140.

The spelling of 11479781 in words is "eleven million, four hundred seventy-nine thousand, seven hundred eighty-one".