5206991 has 2 divisors, whose sum is σ = 5206992. Its totient is φ = 5206990.

The previous prime is 5206967. The next prime is 5206997. The reversal of 5206991 is 1996025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5206991 - 2¹⁴ = 5190607 is a prime.

It is a super-2 number, since 2×5206991² = 54225510548162, which contains 22 as substring.

It is equal to p₃₆₁₈₈₆ and since 5206991 and 361886 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5206997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603495 + 2603496.

It is an arithmetic number, because the mean of its divisors is an integer number (2603496).

Almost surely, 2^5206991 is an apocalyptic number.

5206991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5206991 is an equidigital number, since it uses as much as digits as its factorization.

5206991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 5206991 is about 2281.8832134884. The cubic root of 5206991 is about 173.3254257569.

The spelling of 5206991 in words is "five million, two hundred six thousand, nine hundred ninety-one".