53138973 has 16 divisors (see below), whose sum is σ = 72190976. Its totient is φ = 34760880.

The previous prime is 53138951. The next prime is 53138983. The reversal of 53138973 is 37983135.

It is not a de Polignac number, because 53138973 - 2⁶ = 53138909 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 (53138903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92778 + ... + 93348.

It is an arithmetic number, because the mean of its divisors is an integer number (4511936).

Almost surely, 2^53138973 is an apocalyptic number.

It is an amenable number.

53138973 is a deficient number, since it is larger than the sum of its proper divisors (19052003).

53138973 is a wasteful number, since it uses less digits than its factorization.

53138973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 68040, while the sum is 39.

The square root of 53138973 is about 7289.6483454279. The cubic root of 53138973 is about 375.9566047889.

The spelling of 53138973 in words is "fifty-three million, one hundred thirty-eight thousand, nine hundred seventy-three".