5206491971 has 2 divisors, whose sum is σ = 5206491972. Its totient is φ = 5206491970.

The previous prime is 5206491959. The next prime is 5206491989. The reversal of 5206491971 is 1791946025.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5206491971 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (5206491671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603245985 + 2603245986.

It is an arithmetic number, because the mean of its divisors is an integer number (2603245986).

Almost surely, 2^5206491971 is an apocalyptic number.

5206491971 is a deficient number, since it is larger than the sum of its proper divisors (1).

5206491971 is an equidigital number, since it uses as much as digits as its factorization.

5206491971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 5206491971 is about 72156.0251884761. The cubic root of 5206491971 is about 1733.1988851050.

The spelling of 5206491971 in words is "five billion, two hundred six million, four hundred ninety-one thousand, nine hundred seventy-one".