653673197 has 2 divisors, whose sum is σ = 653673198. Its totient is φ = 653673196.

The previous prime is 653673193. The next prime is 653673277. The reversal of 653673197 is 791376356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 518973961 + 134699236 = 22781^2 + 11606^2 .

It is a cyclic number.

It is not a de Polignac number, because 653673197 - 2² = 653673193 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653673193) 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, 326836598 + 326836599.

It is an arithmetic number, because the mean of its divisors is an integer number (326836599).

Almost surely, 2^653673197 is an apocalyptic number.

It is an amenable number.

653673197 is a deficient number, since it is larger than the sum of its proper divisors (1).

653673197 is an equidigital number, since it uses as much as digits as its factorization.

653673197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 714420, while the sum is 47.

The square root of 653673197 is about 25567.0334024110. The cubic root of 653673197 is about 867.8677678928.

The spelling of 653673197 in words is "six hundred fifty-three million, six hundred seventy-three thousand, one hundred ninety-seven".