53982813 has 4 divisors (see below), whose sum is σ = 71977088. Its totient is φ = 35988540.

The previous prime is 53982809. The next prime is 53982823. The reversal of 53982813 is 31828935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53982813 - 2² = 53982809 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 (53982823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8997133 + ... + 8997138.

It is an arithmetic number, because the mean of its divisors is an integer number (17994272).

Almost surely, 2^53982813 is an apocalyptic number.

It is an amenable number.

53982813 is a deficient number, since it is larger than the sum of its proper divisors (17994275).

53982813 is a wasteful number, since it uses less digits than its factorization.

53982813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17994274.

The product of its digits is 51840, while the sum is 39.

The square root of 53982813 is about 7347.2997080560. The cubic root of 53982813 is about 377.9362102262.

The spelling of 53982813 in words is "fifty-three million, nine hundred eighty-two thousand, eight hundred thirteen".