647824097131 has 2 divisors, whose sum is σ = 647824097132. Its totient is φ = 647824097130.

The previous prime is 647824097057. The next prime is 647824097177. The reversal of 647824097131 is 131790428746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647824097131 - 2¹⁷ = 647823966059 is a prime.

It is a super-2 number, since 2×647824097131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (647824097191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323912048565 + 323912048566.

It is an arithmetic number, because the mean of its divisors is an integer number (323912048566).

Almost surely, 2^647824097131 is an apocalyptic number.

647824097131 is a deficient number, since it is larger than the sum of its proper divisors (1).

647824097131 is an equidigital number, since it uses as much as digits as its factorization.

647824097131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 647824097131 in words is "six hundred forty-seven billion, eight hundred twenty-four million, ninety-seven thousand, one hundred thirty-one".