102189569 has 2 divisors, whose sum is σ = 102189570. Its totient is φ = 102189568.

The previous prime is 102189557. The next prime is 102189599. The reversal of 102189569 is 965981201.

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., 63600625 + 38588944 = 7975^2 + 6212^2 .

It is an emirp because it is prime and its reverse (965981201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102189569 - 2⁴ = 102189553 is a prime.

It is a super-2 number, since 2×102189569² = 20885416024811522, which contains 22 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 (102189599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51094784 + 51094785.

It is an arithmetic number, because the mean of its divisors is an integer number (51094785).

Almost surely, 2^102189569 is an apocalyptic number.

It is an amenable number.

102189569 is a deficient number, since it is larger than the sum of its proper divisors (1).

102189569 is an equidigital number, since it uses as much as digits as its factorization.

102189569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 102189569 is about 10108.8856458069. The cubic root of 102189569 is about 467.5221475204.

The spelling of 102189569 in words is "one hundred two million, one hundred eighty-nine thousand, five hundred sixty-nine".