11399381 has 8 divisors (see below), whose sum is σ = 13077120. Its totient is φ = 9733968.

The previous prime is 11399371. The next prime is 11399383. The reversal of 11399381 is 18399311.

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 11399381 - 2¹⁴ = 11382997 is a prime.

It is a super-2 number, since 2×11399381² = 259891774366322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11399383) 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, 1001 + ... + 4878.

It is an arithmetic number, because the mean of its divisors is an integer number (1634640).

Almost surely, 2^11399381 is an apocalyptic number.

It is an amenable number.

11399381 is a deficient number, since it is larger than the sum of its proper divisors (1677739).

11399381 is an equidigital number, since it uses as much as digits as its factorization.

11399381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163.

The product of its digits is 5832, while the sum is 35.

The square root of 11399381 is about 3376.2969359936. The cubic root of 11399381 is about 225.0576379086.

The spelling of 11399381 in words is "eleven million, three hundred ninety-nine thousand, three hundred eighty-one".