202104391 has 2 divisors, whose sum is σ = 202104392. Its totient is φ = 202104390.

The previous prime is 202104379. The next prime is 202104431. The reversal of 202104391 is 193401202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202104391 - 2⁵ = 202104359 is a prime.

It is a super-2 number, since 2×202104391² = 81692369722961762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202104491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101052195 + 101052196.

It is an arithmetic number, because the mean of its divisors is an integer number (101052196).

Almost surely, 2^202104391 is an apocalyptic number.

202104391 is a deficient number, since it is larger than the sum of its proper divisors (1).

202104391 is an equidigital number, since it uses as much as digits as its factorization.

202104391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 202104391 is about 14216.3423917687. The cubic root of 202104391 is about 586.8474877724.

Adding to 202104391 its reverse (193401202), we get a palindrome (395505593).

The spelling of 202104391 in words is "two hundred two million, one hundred four thousand, three hundred ninety-one".