63021393 has 6 divisors (see below), whose sum is σ = 91030914. Its totient is φ = 42014256.

The previous prime is 63021377. The next prime is 63021421. The reversal of 63021393 is 39312036.

63021393 is a `hidden beast` number, since 630 + 21 + 3 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40297104 + 22724289 = 6348^2 + 4767^2 .

It is not a de Polignac number, because 63021393 - 2⁴ = 63021377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63021353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3501180 + ... + 3501197.

It is an arithmetic number, because the mean of its divisors is an integer number (15171819).

Almost surely, 2^63021393 is an apocalyptic number.

It is an amenable number.

63021393 is a deficient number, since it is larger than the sum of its proper divisors (28009521).

63021393 is a wasteful number, since it uses less digits than its factorization.

63021393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7002383 (or 7002380 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 63021393 is about 7938.6014511373. The cubic root of 63021393 is about 397.9507548306.

The spelling of 63021393 in words is "sixty-three million, twenty-one thousand, three hundred ninety-three".