5217391 has 4 divisors (see below), whose sum is σ = 5302984. Its totient is φ = 5131800.

The previous prime is 5217379. The next prime is 5217403. The reversal of 5217391 is 1937125.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5217379) and next prime (5217403).

It is a cyclic number.

It is not a de Polignac number, because 5217391 - 2⁷ = 5217263 is a prime.

It is a Duffinian number.

5217391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5217341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42705 + ... + 42826.

It is an arithmetic number, because the mean of its divisors is an integer number (1325746).

Almost surely, 2^5217391 is an apocalyptic number.

5217391 is a deficient number, since it is larger than the sum of its proper divisors (85593).

5217391 is an equidigital number, since it uses as much as digits as its factorization.

5217391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85592.

The product of its digits is 1890, while the sum is 28.

The square root of 5217391 is about 2284.1608962593. The cubic root of 5217391 is about 173.4407441592.

The spelling of 5217391 in words is "five million, two hundred seventeen thousand, three hundred ninety-one".