11990913 has 8 divisors (see below), whose sum is σ = 17441376. Its totient is φ = 7267200.

The previous prime is 11990911. The next prime is 11990921. The reversal of 11990913 is 31909911.

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

It is not a de Polignac number, because 11990913 - 2¹ = 11990911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 363361 = 11990913 / (1 + 1 + 9 + 9 + 0 + 9 + 1 + 3).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11990911) 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, 181648 + ... + 181713.

It is an arithmetic number, because the mean of its divisors is an integer number (2180172).

Almost surely, 2^11990913 is an apocalyptic number.

It is an amenable number.

11990913 is a deficient number, since it is larger than the sum of its proper divisors (5450463).

11990913 is a wasteful number, since it uses less digits than its factorization.

11990913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363375.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 11990913 is about 3462.7897712682. The cubic root of 11990913 is about 228.8850449269.

The spelling of 11990913 in words is "eleven million, nine hundred ninety thousand, nine hundred thirteen".