15091889 has 2 divisors, whose sum is σ = 15091890. Its totient is φ = 15091888.

The previous prime is 15091883. The next prime is 15091891. The reversal of 15091889 is 98819051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 153664 = 3865^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 15091889 - 2⁴ = 15091873 is a prime.

It is a super-2 number, since 2×15091889² = 455530227176642, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 15091891, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15091883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7545944 + 7545945.

It is an arithmetic number, because the mean of its divisors is an integer number (7545945).

Almost surely, 2^15091889 is an apocalyptic number.

It is an amenable number.

15091889 is a deficient number, since it is larger than the sum of its proper divisors (1).

15091889 is an equidigital number, since it uses as much as digits as its factorization.

15091889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 15091889 is about 3884.8280528229. The cubic root of 15091889 is about 247.1237776138.

The spelling of 15091889 in words is "fifteen million, ninety-one thousand, eight hundred eighty-nine".