63633401 has 6 divisors (see below), whose sum is σ = 68904990. Its totient is φ = 58738368.

The previous prime is 63633391. The next prime is 63633403. The reversal of 63633401 is 10433636.

It can be written as a sum of positive squares in 3 ways, for example, as 7398400 + 56235001 = 2720^2 + 7499^2 .

It is not a de Polignac number, because 63633401 - 2¹⁴ = 63617017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63633403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188096 + ... + 188433.

It is an arithmetic number, because the mean of its divisors is an integer number (11484165).

Almost surely, 2^63633401 is an apocalyptic number.

It is an amenable number.

63633401 is a deficient number, since it is larger than the sum of its proper divisors (5271589).

63633401 is a wasteful number, since it uses less digits than its factorization.

63633401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376555 (or 376542 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 63633401 is about 7977.0546569520. The cubic root of 63633401 is about 399.2347891477.

The spelling of 63633401 in words is "sixty-three million, six hundred thirty-three thousand, four hundred one".