11172989 has 8 divisors (see below), whose sum is σ = 11573760. Its totient is φ = 10774800.

The previous prime is 11172979. The next prime is 11173003. The reversal of 11172989 is 98927111.

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 11172989 - 2¹² = 11168893 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 (11172929) 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, 13199 + ... + 14019.

It is an arithmetic number, because the mean of its divisors is an integer number (1446720).

Almost surely, 2^11172989 is an apocalyptic number.

It is an amenable number.

11172989 is a deficient number, since it is larger than the sum of its proper divisors (400771).

11172989 is an equidigital number, since it uses as much as digits as its factorization.

11172989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

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

The square root of 11172989 is about 3342.6021300777. The cubic root of 11172989 is about 223.5577810892.

The spelling of 11172989 in words is "eleven million, one hundred seventy-two thousand, nine hundred eighty-nine".