647674297 has 2 divisors, whose sum is σ = 647674298. Its totient is φ = 647674296.

The previous prime is 647674277. The next prime is 647674301. The reversal of 647674297 is 792476746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483296256 + 164378041 = 21984^2 + 12821^2 .

It is a cyclic number.

It is not a de Polignac number, because 647674297 - 2²⁷ = 513456569 is a prime.

It is not a weakly prime, because it can be changed into another prime (647674217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323837148 + 323837149.

It is an arithmetic number, because the mean of its divisors is an integer number (323837149).

Almost surely, 2^647674297 is an apocalyptic number.

It is an amenable number.

647674297 is a deficient number, since it is larger than the sum of its proper divisors (1).

647674297 is an equidigital number, since it uses as much as digits as its factorization.

647674297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 52.

The square root of 647674297 is about 25449.4459075242. The cubic root of 647674297 is about 865.2047348585.

The spelling of 647674297 in words is "six hundred forty-seven million, six hundred seventy-four thousand, two hundred ninety-seven".