202009541 has 2 divisors, whose sum is σ = 202009542. Its totient is φ = 202009540.

The previous prime is 202009523. The next prime is 202009559. The reversal of 202009541 is 145900202.

It is a balanced prime because it is at equal distance from previous prime (202009523) and next prime (202009559).

It can be written as a sum of positive squares in only one way, i.e., 165225316 + 36784225 = 12854^2 + 6065^2 .

It is a cyclic number.

It is not a de Polignac number, because 202009541 - 2²² = 197815237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202009741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101004770 + 101004771.

It is an arithmetic number, because the mean of its divisors is an integer number (101004771).

Almost surely, 2^202009541 is an apocalyptic number.

It is an amenable number.

202009541 is a deficient number, since it is larger than the sum of its proper divisors (1).

202009541 is an equidigital number, since it uses as much as digits as its factorization.

202009541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 202009541 is about 14213.0060507973. The cubic root of 202009541 is about 586.7556685663.

Adding to 202009541 its reverse (145900202), we get a palindrome (347909743).

The spelling of 202009541 in words is "two hundred two million, nine thousand, five hundred forty-one".