102559813 has 4 divisors (see below), whose sum is σ = 102592908. Its totient is φ = 102526720.

The previous prime is 102559801. The next prime is 102559867. The reversal of 102559813 is 318955201.

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 70274689 + 32285124 = 8383^2 + 5682^2 .

It is a cyclic number.

It is not a de Polignac number, because 102559813 - 2²⁵ = 69005381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102559883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11356 + ... + 18277.

It is an arithmetic number, because the mean of its divisors is an integer number (25648227).

Almost surely, 2^102559813 is an apocalyptic number.

It is an amenable number.

102559813 is a deficient number, since it is larger than the sum of its proper divisors (33095).

102559813 is an equidigital number, since it uses as much as digits as its factorization.

102559813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33094.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 102559813 is about 10127.1818883636. The cubic root of 102559813 is about 468.0860949674.

The spelling of 102559813 in words is "one hundred two million, five hundred fifty-nine thousand, eight hundred thirteen".