11156399 has 2 divisors, whose sum is σ = 11156400. Its totient is φ = 11156398.

The previous prime is 11156381. The next prime is 11156413. The reversal of 11156399 is 99365111.

It is a strong prime.

It is an emirp because it is prime and its reverse (99365111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11156399 - 2¹² = 11152303 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11156309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5578199 + 5578200.

It is an arithmetic number, because the mean of its divisors is an integer number (5578200).

Almost surely, 2^11156399 is an apocalyptic number.

11156399 is a deficient number, since it is larger than the sum of its proper divisors (1).

11156399 is an equidigital number, since it uses as much as digits as its factorization.

11156399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 35.

The square root of 11156399 is about 3340.1196086368. The cubic root of 11156399 is about 223.4470777742.

The spelling of 11156399 in words is "eleven million, one hundred fifty-six thousand, three hundred ninety-nine".