11398889 has 2 divisors, whose sum is σ = 11398890. Its totient is φ = 11398888.

The previous prime is 11398847. The next prime is 11398921. The reversal of 11398889 is 98889311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8508889 + 2890000 = 2917^2 + 1700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11398889 is a prime.

It is a super-3 number, since 3×11398889³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11398819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5699444 + 5699445.

It is an arithmetic number, because the mean of its divisors is an integer number (5699445).

Almost surely, 2^11398889 is an apocalyptic number.

It is an amenable number.

11398889 is a deficient number, since it is larger than the sum of its proper divisors (1).

11398889 is an equidigital number, since it uses as much as digits as its factorization.

11398889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 47.

The square root of 11398889 is about 3376.2240743173. The cubic root of 11398889 is about 225.0544000149.

The spelling of 11398889 in words is "eleven million, three hundred ninety-eight thousand, eight hundred eighty-nine".