647693475899 has 2 divisors, whose sum is σ = 647693475900. Its totient is φ = 647693475898.

The previous prime is 647693475889. The next prime is 647693475967. The reversal of 647693475899 is 998574396746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647693475899 - 2²⁸ = 647425040443 is a prime.

It is not a weakly prime, because it can be changed into another prime (647693475889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323846737949 + 323846737950.

It is an arithmetic number, because the mean of its divisors is an integer number (323846737950).

Almost surely, 2^647693475899 is an apocalyptic number.

647693475899 is a deficient number, since it is larger than the sum of its proper divisors (1).

647693475899 is an equidigital number, since it uses as much as digits as its factorization.

647693475899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2469035520, while the sum is 77.

The spelling of 647693475899 in words is "six hundred forty-seven billion, six hundred ninety-three million, four hundred seventy-five thousand, eight hundred ninety-nine".