63688401 has 24 divisors (see below), whose sum is σ = 105952704. Its totient is φ = 36110880.

The previous prime is 63688397. The next prime is 63688421. The reversal of 63688401 is 10488636.

It is a happy number.

It is not a de Polignac number, because 63688401 - 2² = 63688397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63688421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4395 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (4414696).

Almost surely, 2^63688401 is an apocalyptic number.

It is an amenable number.

63688401 is a deficient number, since it is larger than the sum of its proper divisors (42264303).

63688401 is a wasteful number, since it uses less digits than its factorization.

63688401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861 (or 7858 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 63688401 is about 7980.5013000438. The cubic root of 63688401 is about 399.3497790211.

The spelling of 63688401 in words is "sixty-three million, six hundred eighty-eight thousand, four hundred one".