102113309 has 4 divisors (see below), whose sum is σ = 102293340. Its totient is φ = 101933280.

The previous prime is 102113299. The next prime is 102113311. The reversal of 102113309 is 903311201.

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 5189284 + 96924025 = 2278^2 + 9845^2 .

It is a cyclic number.

It is not a de Polignac number, because 102113309 - 2²⁴ = 85336093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102113009) 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, 89162 + ... + 90299.

It is an arithmetic number, because the mean of its divisors is an integer number (25573335).

Almost surely, 2^102113309 is an apocalyptic number.

It is an amenable number.

102113309 is a deficient number, since it is larger than the sum of its proper divisors (180031).

102113309 is an equidigital number, since it uses as much as digits as its factorization.

102113309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180030.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 102113309 is about 10105.1130127278. The cubic root of 102113309 is about 467.4058208677.

The spelling of 102113309 in words is "one hundred two million, one hundred thirteen thousand, three hundred nine".