11381691 has 8 divisors (see below), whose sum is σ = 15208000. Its totient is φ = 7571592.

The previous prime is 11381647. The next prime is 11381693. The reversal of 11381691 is 19618311.

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

It is not a de Polignac number, because 11381691 - 2¹³ = 11373499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11381693) 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, 2305 + ... + 5298.

It is an arithmetic number, because the mean of its divisors is an integer number (1901000).

Almost surely, 2^11381691 is an apocalyptic number.

11381691 is a deficient number, since it is larger than the sum of its proper divisors (3826309).

11381691 is an equidigital number, since it uses as much as digits as its factorization.

11381691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8105.

The product of its digits is 1296, while the sum is 30.

The square root of 11381691 is about 3373.6761848168. The cubic root of 11381691 is about 224.9411599226.

The spelling of 11381691 in words is "eleven million, three hundred eighty-one thousand, six hundred ninety-one".