402202109 has 2 divisors, whose sum is σ = 402202110. Its totient is φ = 402202108.

The previous prime is 402202103. The next prime is 402202111. The reversal of 402202109 is 901202204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361114009 + 41088100 = 19003^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 402202109 - 2⁴ = 402202093 is a prime.

Together with 402202111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402202103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201101054 + 201101055.

It is an arithmetic number, because the mean of its divisors is an integer number (201101055).

Almost surely, 2^402202109 is an apocalyptic number.

It is an amenable number.

402202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

402202109 is an equidigital number, since it uses as much as digits as its factorization.

402202109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 402202109 is about 20054.9771627893. The cubic root of 402202109 is about 738.1559325375.

The spelling of 402202109 in words is "four hundred two million, two hundred two thousand, one hundred nine".