11399843 has 16 divisors (see below), whose sum is σ = 14857920. Its totient is φ = 8487936.

The previous prime is 11399837. The next prime is 11399873. The reversal of 11399843 is 34899311.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11399843 - 2⁴ = 11399827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11399797 and 11399806.

It is not an unprimeable number, because it can be changed into a prime (11399833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2138 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (928620).

Almost surely, 2^11399843 is an apocalyptic number.

11399843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11399843 is a deficient number, since it is larger than the sum of its proper divisors (3458077).

11399843 is a wasteful number, since it uses less digits than its factorization.

11399843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406.

The product of its digits is 23328, while the sum is 38.

The square root of 11399843 is about 3376.3653534533. The cubic root of 11399843 is about 225.0606782849.

The spelling of 11399843 in words is "eleven million, three hundred ninety-nine thousand, eight hundred forty-three".