2103204391 has 2 divisors, whose sum is σ = 2103204392. Its totient is φ = 2103204390.

The previous prime is 2103204319. The next prime is 2103204427. The reversal of 2103204391 is 1934023012.

Together with previous prime (2103204319) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2103204391 - 2⁷ = 2103204263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103204491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051602195 + 1051602196.

It is an arithmetic number, because the mean of its divisors is an integer number (1051602196).

Almost surely, 2^2103204391 is an apocalyptic number.

2103204391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103204391 is an equidigital number, since it uses as much as digits as its factorization.

2103204391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2103204391 is about 45860.7063944724. The cubic root of 2103204391 is about 1281.2301794245.

The spelling of 2103204391 in words is "two billion, one hundred three million, two hundred four thousand, three hundred ninety-one".