53988013 has 4 divisors (see below), whose sum is σ = 54088348. Its totient is φ = 53887680.

The previous prime is 53987963. The next prime is 53988049. The reversal of 53988013 is 31088935.

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 22155849 + 31832164 = 4707^2 + 5642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53988013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53988313) 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, 49356 + ... + 50437.

It is an arithmetic number, because the mean of its divisors is an integer number (13522087).

Almost surely, 2^53988013 is an apocalyptic number.

It is an amenable number.

53988013 is a deficient number, since it is larger than the sum of its proper divisors (100335).

53988013 is an equidigital number, since it uses as much as digits as its factorization.

53988013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100334.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 53988013 is about 7347.6535710389. The cubic root of 53988013 is about 377.9483449846.

The spelling of 53988013 in words is "fifty-three million, nine hundred eighty-eight thousand, thirteen".