15641189 has 2 divisors, whose sum is σ = 15641190. Its totient is φ = 15641188.

The previous prime is 15641183. The next prime is 15641191. The reversal of 15641189 is 98114651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 7745089 = 2810^2 + 2783^2 .

It is a cyclic number.

It is not a de Polignac number, because 15641189 - 2¹⁶ = 15575653 is a prime.

Together with 15641191, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15641183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820594 + 7820595.

It is an arithmetic number, because the mean of its divisors is an integer number (7820595).

Almost surely, 2^15641189 is an apocalyptic number.

It is an amenable number.

15641189 is a deficient number, since it is larger than the sum of its proper divisors (1).

15641189 is an equidigital number, since it uses as much as digits as its factorization.

15641189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 15641189 is about 3954.8943095865. The cubic root of 15641189 is about 250.0863115312.

The spelling of 15641189 in words is "fifteen million, six hundred forty-one thousand, one hundred eighty-nine".