63457421 has 2 divisors, whose sum is σ = 63457422. Its totient is φ = 63457420.

The previous prime is 63457409. The next prime is 63457439. The reversal of 63457421 is 12475436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60668521 + 2788900 = 7789^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 63457421 - 2⁶ = 63457357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63457451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31728710 + 31728711.

It is an arithmetic number, because the mean of its divisors is an integer number (31728711).

Almost surely, 2^63457421 is an apocalyptic number.

It is an amenable number.

63457421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63457421 is an equidigital number, since it uses as much as digits as its factorization.

63457421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 63457421 is about 7966.0166331737. The cubic root of 63457421 is about 398.8664175954.

The spelling of 63457421 in words is "sixty-three million, four hundred fifty-seven thousand, four hundred twenty-one".