63415421 has 2 divisors, whose sum is σ = 63415422. Its totient is φ = 63415420.

The previous prime is 63415409. The next prime is 63415481. The reversal of 63415421 is 12451436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 1792921 = 7850^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 63415421 - 2⁶ = 63415357 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 (63415481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31707710 + 31707711.

It is an arithmetic number, because the mean of its divisors is an integer number (31707711).

Almost surely, 2^63415421 is an apocalyptic number.

It is an amenable number.

63415421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63415421 is an equidigital number, since it uses as much as digits as its factorization.

63415421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 63415421 is about 7963.3799984680. The cubic root of 63415421 is about 398.7784001156.

Adding to 63415421 its reverse (12451436), we get a palindrome (75866857).

It can be divided in two parts, 63415 and 421, that added together give a palindrome (63836).

The spelling of 63415421 in words is "sixty-three million, four hundred fifteen thousand, four hundred twenty-one".