653391397 has 2 divisors, whose sum is σ = 653391398. Its totient is φ = 653391396.

The previous prime is 653391359. The next prime is 653391443. The reversal of 653391397 is 793193356.

It is an a-pointer prime, because the next prime (653391443) can be obtained adding 653391397 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634737636 + 18653761 = 25194^2 + 4319^2 .

It is a cyclic number.

It is not a de Polignac number, because 653391397 - 2⁷ = 653391269 is a prime.

It is a super-2 number, since 2×653391397² = 853840635347223218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653391317) 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, 326695698 + 326695699.

It is an arithmetic number, because the mean of its divisors is an integer number (326695699).

Almost surely, 2^653391397 is an apocalyptic number.

It is an amenable number.

653391397 is a deficient number, since it is larger than the sum of its proper divisors (1).

653391397 is an equidigital number, since it uses as much as digits as its factorization.

653391397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 46.

The square root of 653391397 is about 25561.5218052447. The cubic root of 653391397 is about 867.7430367117.

The spelling of 653391397 in words is "six hundred fifty-three million, three hundred ninety-one thousand, three hundred ninety-seven".