102353509 has 4 divisors (see below), whose sum is σ = 102919180. Its totient is φ = 101787840.

The previous prime is 102353483. The next prime is 102353561. The reversal of 102353509 is 905353201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27531009 + 74822500 = 5247^2 + 8650^2 .

It is a cyclic number.

It is not a de Polignac number, because 102353509 - 2¹⁷ = 102222437 is a prime.

It is a super-2 number, since 2×102353509² = 20952481609226162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102353569) 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 3 ways as a sum of consecutive naturals, for example, 282564 + ... + 282925.

It is an arithmetic number, because the mean of its divisors is an integer number (25729795).

Almost surely, 2^102353509 is an apocalyptic number.

It is an amenable number.

102353509 is a deficient number, since it is larger than the sum of its proper divisors (565671).

102353509 is an equidigital number, since it uses as much as digits as its factorization.

102353509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565670.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 102353509 is about 10116.9911040783. The cubic root of 102353509 is about 467.7720250480.

The spelling of 102353509 in words is "one hundred two million, three hundred fifty-three thousand, five hundred nine".