11199623287 has 2 divisors, whose sum is σ = 11199623288. Its totient is φ = 11199623286.

The previous prime is 11199623221. The next prime is 11199623299. The reversal of 11199623287 is 78232699111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11199623287 - 2⁷ = 11199623159 is a prime.

It is a super-3 number, since 3×11199623287³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11199623287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11199624287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599811643 + 5599811644.

It is an arithmetic number, because the mean of its divisors is an integer number (5599811644).

Almost surely, 2^11199623287 is an apocalyptic number.

11199623287 is a deficient number, since it is larger than the sum of its proper divisors (1).

11199623287 is an equidigital number, since it uses as much as digits as its factorization.

11199623287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The spelling of 11199623287 in words is "eleven billion, one hundred ninety-nine million, six hundred twenty-three thousand, two hundred eighty-seven".