63465621 has 4 divisors (see below), whose sum is σ = 84620832. Its totient is φ = 42310412.

The previous prime is 63465617. The next prime is 63465629. The reversal of 63465621 is 12656436.

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.

It is a cyclic number.

It is not a de Polignac number, because 63465621 - 2² = 63465617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63465629) 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, 10577601 + ... + 10577606.

It is an arithmetic number, because the mean of its divisors is an integer number (21155208).

Almost surely, 2^63465621 is an apocalyptic number.

It is an amenable number.

63465621 is a deficient number, since it is larger than the sum of its proper divisors (21155211).

63465621 is a wasteful number, since it uses less digits than its factorization.

63465621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21155210.

The product of its digits is 25920, while the sum is 33.

The square root of 63465621 is about 7966.5313028946. The cubic root of 63465621 is about 398.8835974287.

The spelling of 63465621 in words is "sixty-three million, four hundred sixty-five thousand, six hundred twenty-one".