2173025891 has 2 divisors, whose sum is σ = 2173025892. Its totient is φ = 2173025890.

The previous prime is 2173025857. The next prime is 2173025927. The reversal of 2173025891 is 1985203712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2173025891 - 2²⁶ = 2105917027 is a prime.

It is not a weakly prime, because it can be changed into another prime (2173025831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086512945 + 1086512946.

It is an arithmetic number, because the mean of its divisors is an integer number (1086512946).

Almost surely, 2^2173025891 is an apocalyptic number.

2173025891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173025891 is an equidigital number, since it uses as much as digits as its factorization.

2173025891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 2173025891 is about 46615.7257907672. The cubic root of 2173025891 is about 1295.2540739689.

The spelling of 2173025891 in words is "two billion, one hundred seventy-three million, twenty-five thousand, eight hundred ninety-one".