647022697193 has 2 divisors, whose sum is σ = 647022697194. Its totient is φ = 647022697192.

The previous prime is 647022697183. The next prime is 647022697213. The reversal of 647022697193 is 391796220746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643633943824 + 3388753369 = 802268^2 + 58213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647022697193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (647022697103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323511348596 + 323511348597.

It is an arithmetic number, because the mean of its divisors is an integer number (323511348597).

Almost surely, 2^647022697193 is an apocalyptic number.

It is an amenable number.

647022697193 is a deficient number, since it is larger than the sum of its proper divisors (1).

647022697193 is an equidigital number, since it uses as much as digits as its factorization.

647022697193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 56.

The spelling of 647022697193 in words is "six hundred forty-seven billion, twenty-two million, six hundred ninety-seven thousand, one hundred ninety-three".