202027109 has 4 divisors (see below), whose sum is σ = 202082604. Its totient is φ = 201971616.

The previous prime is 202027069. The next prime is 202027121. The reversal of 202027109 is 901720202.

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 136773025 + 65254084 = 11695^2 + 8078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202027109 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 (202027159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21872 + ... + 29705.

It is an arithmetic number, because the mean of its divisors is an integer number (50520651).

Almost surely, 2^202027109 is an apocalyptic number.

It is an amenable number.

202027109 is a deficient number, since it is larger than the sum of its proper divisors (55495).

202027109 is an equidigital number, since it uses as much as digits as its factorization.

202027109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55494.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 202027109 is about 14213.6240628490. The cubic root of 202027109 is about 586.7726773748.

The spelling of 202027109 in words is "two hundred two million, twenty-seven thousand, one hundred nine".