11123457887 has 2 divisors, whose sum is σ = 11123457888. Its totient is φ = 11123457886.

The previous prime is 11123457883. The next prime is 11123457929. The reversal of 11123457887 is 78875432111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11123457887 - 2² = 11123457883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123457883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561728943 + 5561728944.

It is an arithmetic number, because the mean of its divisors is an integer number (5561728944).

Almost surely, 2^11123457887 is an apocalyptic number.

11123457887 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123457887 is an equidigital number, since it uses as much as digits as its factorization.

11123457887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 47.

Adding to 11123457887 its reverse (78875432111), we get a palindrome (89998889998).

The spelling of 11123457887 in words is "eleven billion, one hundred twenty-three million, four hundred fifty-seven thousand, eight hundred eighty-seven".