63406613 has 4 divisors (see below), whose sum is σ = 63511680. Its totient is φ = 63301548.

The previous prime is 63406571. The next prime is 63406627. The reversal of 63406613 is 31660436.

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 63406613 - 2²⁴ = 46629397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63406813) 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, 51623 + ... + 52836.

It is an arithmetic number, because the mean of its divisors is an integer number (15877920).

Almost surely, 2^63406613 is an apocalyptic number.

It is an amenable number.

63406613 is a deficient number, since it is larger than the sum of its proper divisors (105067).

63406613 is a wasteful number, since it uses less digits than its factorization.

63406613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105066.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 63406613 is about 7962.8269477617. The cubic root of 63406613 is about 398.7599366634.

The spelling of 63406613 in words is "sixty-three million, four hundred six thousand, six hundred thirteen".