10204391 has 2 divisors, whose sum is σ = 10204392. Its totient is φ = 10204390.

The previous prime is 10204343. The next prime is 10204409. The reversal of 10204391 is 19340201.

10204391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10204391 - 2²² = 6010087 is a prime.

It is a Sophie Germain 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 (10204321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5102195 + 5102196.

It is an arithmetic number, because the mean of its divisors is an integer number (5102196).

Almost surely, 2^10204391 is an apocalyptic number.

10204391 is a deficient number, since it is larger than the sum of its proper divisors (1).

10204391 is an equidigital number, since it uses as much as digits as its factorization.

10204391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 10204391 is about 3194.4312482819. The cubic root of 10204391 is about 216.9014042381.

Adding to 10204391 its reverse (19340201), we get a palindrome (29544592).

The spelling of 10204391 in words is "ten million, two hundred four thousand, three hundred ninety-one".