63420641 has 4 divisors (see below), whose sum is σ = 63436800. Its totient is φ = 63404484.

The previous prime is 63420631. The next prime is 63420649. The reversal of 63420641 is 14602436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63420641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63420641.

It is not an unprimeable number, because it can be changed into a prime (63420649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000 + ... + 11438.

It is an arithmetic number, because the mean of its divisors is an integer number (15859200).

Almost surely, 2^63420641 is an apocalyptic number.

It is an amenable number.

63420641 is a deficient number, since it is larger than the sum of its proper divisors (16159).

63420641 is an equidigital number, since it uses as much as digits as its factorization.

63420641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16158.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 63420641 is about 7963.7077420006. The cubic root of 63420641 is about 398.7893415454.

The spelling of 63420641 in words is "sixty-three million, four hundred twenty thousand, six hundred forty-one".