202492109 has 2 divisors, whose sum is σ = 202492110. Its totient is φ = 202492108.

The previous prime is 202492067. The next prime is 202492111. The reversal of 202492109 is 901294202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185558884 + 16933225 = 13622^2 + 4115^2 .

It is a cyclic number.

It is not a de Polignac number, because 202492109 - 2¹⁶ = 202426573 is a prime.

It is a Sophie Germain prime.

Together with 202492111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202492909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101246054 + 101246055.

It is an arithmetic number, because the mean of its divisors is an integer number (101246055).

Almost surely, 2^202492109 is an apocalyptic number.

It is an amenable number.

202492109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202492109 is an equidigital number, since it uses as much as digits as its factorization.

202492109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 202492109 is about 14229.9722065786. The cubic root of 202492109 is about 587.2225183675. Note that the first 3 decimals are identical.

The spelling of 202492109 in words is "two hundred two million, four hundred ninety-two thousand, one hundred nine".