6397553 has 2 divisors, whose sum is σ = 6397554. Its totient is φ = 6397552.

The previous prime is 6397549. The next prime is 6397571. The reversal of 6397553 is 3557936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6210064 + 187489 = 2492^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397553 - 2² = 6397549 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6397453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198776 + 3198777.

It is an arithmetic number, because the mean of its divisors is an integer number (3198777).

Almost surely, 2^6397553 is an apocalyptic number.

It is an amenable number.

6397553 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397553 is an equidigital number, since it uses as much as digits as its factorization.

6397553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 38.

The square root of 6397553 is about 2529.3384510579. The cubic root of 6397553 is about 185.6398878951.

It can be divided in two parts, 639 and 7553, that added together give a 13-th power (8192 = 2¹³).

The spelling of 6397553 in words is "six million, three hundred ninety-seven thousand, five hundred fifty-three".