11419987287 has 4 divisors (see below), whose sum is σ = 15226649720. Its totient is φ = 7613324856.

The previous prime is 11419987277. The next prime is 11419987309. The reversal of 11419987287 is 78278991411.

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

It is not a de Polignac number, because 11419987287 - 2⁶ = 11419987223 is a prime.

It is a super-2 number, since 2×11419987287² (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 (11419987237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903331212 + ... + 1903331217.

It is an arithmetic number, because the mean of its divisors is an integer number (3806662430).

Almost surely, 2^11419987287 is an apocalyptic number.

11419987287 is a deficient number, since it is larger than the sum of its proper divisors (3806662433).

11419987287 is an equidigital number, since it uses as much as digits as its factorization.

11419987287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806662432.

The product of its digits is 2032128, while the sum is 57.

The spelling of 11419987287 in words is "eleven billion, four hundred nineteen million, nine hundred eighty-seven thousand, two hundred eighty-seven".