63570421 has 2 divisors, whose sum is σ = 63570422. Its totient is φ = 63570420.

The previous prime is 63570401. The next prime is 63570427. The reversal of 63570421 is 12407536.

63570421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50211396 + 13359025 = 7086^2 + 3655^2 .

It is a cyclic number.

It is not a de Polignac number, because 63570421 - 2⁵ = 63570389 is a prime.

It is a super-2 number, since 2×63570421² = 8082396852234482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63570421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63570427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31785210 + 31785211.

It is an arithmetic number, because the mean of its divisors is an integer number (31785211).

Almost surely, 2^63570421 is an apocalyptic number.

It is an amenable number.

63570421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63570421 is an equidigital number, since it uses as much as digits as its factorization.

63570421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 63570421 is about 7973.1061074088. The cubic root of 63570421 is about 399.1030338829.

Adding to 63570421 its reverse (12407536), we get a palindrome (75977957).

The spelling of 63570421 in words is "sixty-three million, five hundred seventy thousand, four hundred twenty-one".