102534809 has 8 divisors (see below), whose sum is σ = 113115912. Its totient is φ = 92338560.

The previous prime is 102534799. The next prime is 102534823. The reversal of 102534809 is 908435201.

It can be written as a sum of positive squares in 4 ways, for example, as 6553600 + 95981209 = 2560^2 + 9797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102534809 - 2⁴ = 102534793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102534829) 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 in 7 ways as a sum of consecutive naturals, for example, 95654 + ... + 96719.

It is an arithmetic number, because the mean of its divisors is an integer number (14139489).

Almost surely, 2^102534809 is an apocalyptic number.

It is an amenable number.

102534809 is a deficient number, since it is larger than the sum of its proper divisors (10581103).

102534809 is a wasteful number, since it uses less digits than its factorization.

102534809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192427.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 102534809 is about 10125.9473137085. The cubic root of 102534809 is about 468.0480522044.

The spelling of 102534809 in words is "one hundred two million, five hundred thirty-four thousand, eight hundred nine".