11234567887 has 4 divisors (see below), whose sum is σ = 11446540920. Its totient is φ = 11022594856.

The previous prime is 11234567867. The next prime is 11234567933. The reversal of 11234567887 is 78876543211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78876543211 = 43711 ⋅1804501.

It is a cyclic number.

It is not a de Polignac number, because 11234567887 - 2¹⁹ = 11234043599 is a prime.

It is a super-2 number, since 2×11234567887² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11234567807) 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, 105986437 + ... + 105986542.

It is an arithmetic number, because the mean of its divisors is an integer number (2861635230).

Almost surely, 2^11234567887 is an apocalyptic number.

11234567887 is a deficient number, since it is larger than the sum of its proper divisors (211973033).

11234567887 is an equidigital number, since it uses as much as digits as its factorization.

11234567887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211973032.

The product of its digits is 2257920, while the sum is 52.

It can be divided in two parts, 11234 and 567887, that added together give a square (579121 = 761²).

The spelling of 11234567887 in words is "eleven billion, two hundred thirty-four million, five hundred sixty-seven thousand, eight hundred eighty-seven".