11287919 has 8 divisors (see below), whose sum is σ = 11952000. Its totient is φ = 10630872.

The previous prime is 11287891. The next prime is 11287921. The reversal of 11287919 is 91978211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11287919 - 2⁸ = 11287663 is a prime.

It is a super-2 number, since 2×11287919² = 254834230701122, which 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 (11287519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1742 + ... + 5060.

It is an arithmetic number, because the mean of its divisors is an integer number (1494000).

Almost surely, 2^11287919 is an apocalyptic number.

11287919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11287919 is a deficient number, since it is larger than the sum of its proper divisors (664081).

11287919 is a wasteful number, since it uses less digits than its factorization.

11287919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517.

The product of its digits is 9072, while the sum is 38.

The square root of 11287919 is about 3359.7498418781. The cubic root of 11287919 is about 224.3217037310.

The spelling of 11287919 in words is "eleven million, two hundred eighty-seven thousand, nine hundred nineteen".