11889869 has 2 divisors, whose sum is σ = 11889870. Its totient is φ = 11889868.

The previous prime is 11889859. The next prime is 11889893. The reversal of 11889869 is 96898811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8631844 + 3258025 = 2938^2 + 1805^2 .

It is an emirp because it is prime and its reverse (96898811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11889869 - 2⁴ = 11889853 is a prime.

It is a super-2 number, since 2×11889869² = 282737969674322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11889809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5944934 + 5944935.

It is an arithmetic number, because the mean of its divisors is an integer number (5944935).

Almost surely, 2^11889869 is an apocalyptic number.

It is an amenable number.

11889869 is a deficient number, since it is larger than the sum of its proper divisors (1).

11889869 is an equidigital number, since it uses as much as digits as its factorization.

11889869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 50.

The square root of 11889869 is about 3448.1689343766. The cubic root of 11889869 is about 228.2403142280.

The spelling of 11889869 in words is "eleven million, eight hundred eighty-nine thousand, eight hundred sixty-nine".