58638721 has 4 divisors (see below), whose sum is σ = 58680532. Its totient is φ = 58596912.

The previous prime is 58638703. The next prime is 58638773. The reversal of 58638721 is 12783685.

58638721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29866225 + 28772496 = 5465^2 + 5364^2 .

It is a cyclic number.

It is not a de Polignac number, because 58638721 - 2¹¹ = 58636673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (58638781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18726 + ... + 21631.

It is an arithmetic number, because the mean of its divisors is an integer number (14670133).

Almost surely, 2^58638721 is an apocalyptic number.

It is an amenable number.

58638721 is a deficient number, since it is larger than the sum of its proper divisors (41811).

58638721 is a wasteful number, since it uses less digits than its factorization.

58638721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41810.

The product of its digits is 80640, while the sum is 40.

The square root of 58638721 is about 7657.5923761976. The cubic root of 58638721 is about 388.5034051956.

The spelling of 58638721 in words is "fifty-eight million, six hundred thirty-eight thousand, seven hundred twenty-one".