5173991 has 2 divisors, whose sum is σ = 5173992. Its totient is φ = 5173990.

The previous prime is 5173981. The next prime is 5174003. The reversal of 5173991 is 1993715.

5173991 is digitally balanced in base 3, 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 a de Polignac number, because none of the positive numbers 2^k-5173991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5173951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2586995 + 2586996.

It is an arithmetic number, because the mean of its divisors is an integer number (2586996).

Almost surely, 2^5173991 is an apocalyptic number.

5173991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5173991 is an equidigital number, since it uses as much as digits as its factorization.

5173991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505, while the sum is 35.

The square root of 5173991 is about 2274.6408507718. The cubic root of 5173991 is about 172.9584918292.

The spelling of 5173991 in words is "five million, one hundred seventy-three thousand, nine hundred ninety-one".