2628193891 has 2 divisors, whose sum is σ = 2628193892. Its totient is φ = 2628193890.

The previous prime is 2628193873. The next prime is 2628193993. The reversal of 2628193891 is 1983918262.

2628193891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2628193891 - 2⁵ = 2628193859 is a prime.

It is not a weakly prime, because it can be changed into another prime (2628193801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314096945 + 1314096946.

It is an arithmetic number, because the mean of its divisors is an integer number (1314096946).

Almost surely, 2^2628193891 is an apocalyptic number.

2628193891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2628193891 is an equidigital number, since it uses as much as digits as its factorization.

2628193891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 2628193891 is about 51265.9135391149. The cubic root of 2628193891 is about 1380.0213346488.

The spelling of 2628193891 in words is "two billion, six hundred twenty-eight million, one hundred ninety-three thousand, eight hundred ninety-one".