5166391 has 2 divisors, whose sum is σ = 5166392. Its totient is φ = 5166390.

The previous prime is 5166389. The next prime is 5166401. The reversal of 5166391 is 1936615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5166391 - 2¹ = 5166389 is a prime.

Together with 5166389, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5166311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583195 + 2583196.

It is an arithmetic number, because the mean of its divisors is an integer number (2583196).

Almost surely, 2^5166391 is an apocalyptic number.

5166391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5166391 is an equidigital number, since it uses as much as digits as its factorization.

5166391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 5166391 is about 2272.9696434401. The cubic root of 5166391 is about 172.8737649280.

The spelling of 5166391 in words is "five million, one hundred sixty-six thousand, three hundred ninety-one".