647974501351 has 2 divisors, whose sum is σ = 647974501352. Its totient is φ = 647974501350.

The previous prime is 647974501303. The next prime is 647974501379. The reversal of 647974501351 is 153105479746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647974501351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647974001351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323987250675 + 323987250676.

It is an arithmetic number, because the mean of its divisors is an integer number (323987250676).

Almost surely, 2^647974501351 is an apocalyptic number.

647974501351 is a deficient number, since it is larger than the sum of its proper divisors (1).

647974501351 is an equidigital number, since it uses as much as digits as its factorization.

647974501351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 647974501351 in words is "six hundred forty-seven billion, nine hundred seventy-four million, five hundred one thousand, three hundred fifty-one".