102545609 has 2 divisors, whose sum is σ = 102545610. Its totient is φ = 102545608.

The previous prime is 102545593. The next prime is 102545617. The reversal of 102545609 is 906545201.

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., 83814025 + 18731584 = 9155^2 + 4328^2 .

It is a cyclic number.

It is not a de Polignac number, because 102545609 - 2⁴ = 102545593 is a prime.

It is not a weakly prime, because it can be changed into another prime (102545629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51272804 + 51272805.

It is an arithmetic number, because the mean of its divisors is an integer number (51272805).

Almost surely, 2^102545609 is an apocalyptic number.

It is an amenable number.

102545609 is a deficient number, since it is larger than the sum of its proper divisors (1).

102545609 is an equidigital number, since it uses as much as digits as its factorization.

102545609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 102545609 is about 10126.4805831049. The cubic root of 102545609 is about 468.0644848076.

The spelling of 102545609 in words is "one hundred two million, five hundred forty-five thousand, six hundred nine".