11319991 has 8 divisors (see below), whose sum is σ = 12300800. Its totient is φ = 10377720.

The previous prime is 11319983. The next prime is 11320003. The reversal of 11319991 is 19991311.

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 11319991 - 2³ = 11319983 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11319901) 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, 9021 + ... + 10198.

It is an arithmetic number, because the mean of its divisors is an integer number (1537600).

Almost surely, 2^11319991 is an apocalyptic number.

11319991 is a deficient number, since it is larger than the sum of its proper divisors (980809).

11319991 is a wasteful number, since it uses less digits than its factorization.

11319991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19269.

The product of its digits is 2187, while the sum is 34.

The square root of 11319991 is about 3364.5194307657. The cubic root of 11319991 is about 224.5339555090.

The spelling of 11319991 in words is "eleven million, three hundred nineteen thousand, nine hundred ninety-one".