63597421 has 2 divisors, whose sum is σ = 63597422. Its totient is φ = 63597420.

The previous prime is 63597419. The next prime is 63597431. The reversal of 63597421 is 12479536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60621796 + 2975625 = 7786^2 + 1725^2 .

It is a cyclic number.

It is not a de Polignac number, because 63597421 - 2¹ = 63597419 is a prime.

Together with 63597419, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63597431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31798710 + 31798711.

It is an arithmetic number, because the mean of its divisors is an integer number (31798711).

Almost surely, 2^63597421 is an apocalyptic number.

It is an amenable number.

63597421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63597421 is an equidigital number, since it uses as much as digits as its factorization.

63597421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 63597421 is about 7974.7991197271. The cubic root of 63597421 is about 399.1595290082.

The spelling of 63597421 in words is "sixty-three million, five hundred ninety-seven thousand, four hundred twenty-one".