653344217 has 2 divisors, whose sum is σ = 653344218. Its totient is φ = 653344216.

The previous prime is 653344213. The next prime is 653344267. The reversal of 653344217 is 712443356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443355136 + 209989081 = 21056^2 + 14491^2 .

It is a cyclic number.

It is not a de Polignac number, because 653344217 - 2² = 653344213 is a prime.

It is not a weakly prime, because it can be changed into another prime (653344213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326672108 + 326672109.

It is an arithmetic number, because the mean of its divisors is an integer number (326672109).

Almost surely, 2^653344217 is an apocalyptic number.

It is an amenable number.

653344217 is a deficient number, since it is larger than the sum of its proper divisors (1).

653344217 is an equidigital number, since it uses as much as digits as its factorization.

653344217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

The square root of 653344217 is about 25560.5989170833. The cubic root of 653344217 is about 867.7221502507.

The spelling of 653344217 in words is "six hundred fifty-three million, three hundred forty-four thousand, two hundred seventeen".