53117983 has 4 divisors (see below), whose sum is σ = 53180680. Its totient is φ = 53055288.

The previous prime is 53117969. The next prime is 53117993. The reversal of 53117983 is 38971135.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53117983 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 (53117993) 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, 30060 + ... + 31777.

It is an arithmetic number, because the mean of its divisors is an integer number (13295170).

Almost surely, 2^53117983 is an apocalyptic number.

53117983 is a deficient number, since it is larger than the sum of its proper divisors (62697).

53117983 is an equidigital number, since it uses as much as digits as its factorization.

53117983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62696.

The product of its digits is 22680, while the sum is 37.

The square root of 53117983 is about 7288.2084904317. The cubic root of 53117983 is about 375.9070970676.

The spelling of 53117983 in words is "fifty-three million, one hundred seventeen thousand, nine hundred eighty-three".