202040389 has 2 divisors, whose sum is σ = 202040390. Its totient is φ = 202040388.

The previous prime is 202040381. The next prime is 202040401. The reversal of 202040389 is 983040202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143640225 + 58400164 = 11985^2 + 7642^2 .

It is a cyclic number.

It is not a de Polignac number, because 202040389 - 2³ = 202040381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202040381) 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 as a sum of consecutive naturals, namely, 101020194 + 101020195.

It is an arithmetic number, because the mean of its divisors is an integer number (101020195).

Almost surely, 2^202040389 is an apocalyptic number.

It is an amenable number.

202040389 is a deficient number, since it is larger than the sum of its proper divisors (1).

202040389 is an equidigital number, since it uses as much as digits as its factorization.

202040389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 202040389 is about 14214.0912125960. The cubic root of 202040389 is about 586.7855340164.

The spelling of 202040389 in words is "two hundred two million, forty thousand, three hundred eighty-nine".