53997137 has 4 divisors (see below), whose sum is σ = 54015156. Its totient is φ = 53979120.

The previous prime is 53997127. The next prime is 53997143. The reversal of 53997137 is 73179935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73179935 = 5 ⋅14635987.

It can be written as a sum of positive squares in 2 ways, for example, as 14508481 + 39488656 = 3809^2 + 6284^2 .

It is a cyclic number.

It is not a de Polignac number, because 53997137 - 2⁸ = 53996881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53997127) 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, 3314 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (13503789).

Almost surely, 2^53997137 is an apocalyptic number.

It is an amenable number.

53997137 is a deficient number, since it is larger than the sum of its proper divisors (18019).

53997137 is a wasteful number, since it uses less digits than its factorization.

53997137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18018.

The product of its digits is 178605, while the sum is 44.

The square root of 53997137 is about 7348.2744232915. The cubic root of 53997137 is about 377.9696349357.

The spelling of 53997137 in words is "fifty-three million, nine hundred ninety-seven thousand, one hundred thirty-seven".