11399963 has 4 divisors (see below), whose sum is σ = 11412720. Its totient is φ = 11387208.

The previous prime is 11399957. The next prime is 11399977. The reversal of 11399963 is 36999311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11399963 - 2¹⁰ = 11398939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11399963.

It is not an unprimeable number, because it can be changed into a prime (11399903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4928 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (2853180).

Almost surely, 2^11399963 is an apocalyptic number.

11399963 is a deficient number, since it is larger than the sum of its proper divisors (12757).

11399963 is an equidigital number, since it uses as much as digits as its factorization.

11399963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12756.

The product of its digits is 39366, while the sum is 41.

The square root of 11399963 is about 3376.3831239953. The cubic root of 11399963 is about 225.0614679796.

The spelling of 11399963 in words is "eleven million, three hundred ninety-nine thousand, nine hundred sixty-three".