63606381 has 4 divisors (see below), whose sum is σ = 84808512. Its totient is φ = 42404252.

The previous prime is 63606377. The next prime is 63606421. The reversal of 63606381 is 18360636.

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 63606381 - 2² = 63606377 is a prime.

It is a super-2 number, since 2×63606381² = 8091543407834322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63606341) 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, 10601061 + ... + 10601066.

It is an arithmetic number, because the mean of its divisors is an integer number (21202128).

Almost surely, 2^63606381 is an apocalyptic number.

It is an amenable number.

63606381 is a deficient number, since it is larger than the sum of its proper divisors (21202131).

63606381 is a wasteful number, since it uses less digits than its factorization.

63606381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21202130.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 63606381 is about 7975.3608695783. The cubic root of 63606381 is about 399.1782734865.

The spelling of 63606381 in words is "sixty-three million, six hundred six thousand, three hundred eighty-one".