11701989 has 20 divisors (see below), whose sum is σ = 18827116. Its totient is φ = 7200576.

The previous prime is 11701979. The next prime is 11702011. The reversal of 11701989 is 98910711.

It can be written as a sum of positive squares in 2 ways, for example, as 613089 + 11088900 = 783^2 + 3330^2 .

It is not a de Polignac number, because 11701989 - 2⁷ = 11701861 is a prime.

It is a super-2 number, since 2×11701989² = 273873093112242, 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 (11701909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4504 + ... + 6609.

Almost surely, 2^11701989 is an apocalyptic number.

It is an amenable number.

11701989 is a deficient number, since it is larger than the sum of its proper divisors (7125127).

11701989 is a wasteful number, since it uses less digits than its factorization.

11701989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11138 (or 11129 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 11701989 is about 3420.8170076752. The cubic root of 11701989 is about 227.0317317385.

The spelling of 11701989 in words is "eleven million, seven hundred one thousand, nine hundred eighty-nine".