11170991 has 8 divisors (see below), whose sum is σ = 12228384. Its totient is φ = 10141920.

The previous prime is 11170987. The next prime is 11170997. The reversal of 11170991 is 19907111.

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 11170991 - 2² = 11170987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11170997) 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, 6251 + ... + 7836.

It is an arithmetic number, because the mean of its divisors is an integer number (1528548).

Almost surely, 2^11170991 is an apocalyptic number.

11170991 is a deficient number, since it is larger than the sum of its proper divisors (1057393).

11170991 is a wasteful number, since it uses less digits than its factorization.

11170991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14161.

The product of its (nonzero) digits is 567, while the sum is 29.

The square root of 11170991 is about 3342.3032477619. The cubic root of 11170991 is about 223.5444544531.

The spelling of 11170991 in words is "eleven million, one hundred seventy thousand, nine hundred ninety-one".