653997193 has 2 divisors, whose sum is σ = 653997194. Its totient is φ = 653997192.

The previous prime is 653997181. The next prime is 653997199. The reversal of 653997193 is 391799356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649383289 + 4613904 = 25483^2 + 2148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653997193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 653997193.

It is not a weakly prime, because it can be changed into another prime (653997199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326998596 + 326998597.

It is an arithmetic number, because the mean of its divisors is an integer number (326998597).

Almost surely, 2^653997193 is an apocalyptic number.

It is an amenable number.

653997193 is a deficient number, since it is larger than the sum of its proper divisors (1).

653997193 is an equidigital number, since it uses as much as digits as its factorization.

653997193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 52.

The square root of 653997193 is about 25573.3688238370. The cubic root of 653997193 is about 868.0111317033.

The spelling of 653997193 in words is "six hundred fifty-three million, nine hundred ninety-seven thousand, one hundred ninety-three".