53997129 has 6 divisors (see below), whose sum is σ = 77995866. Its totient is φ = 35998080.

The previous prime is 53997127. The next prime is 53997143. The reversal of 53997129 is 92179935.

It is a happy number.

53997129 is a `hidden beast` number, since 539 + 97 + 1 + 29 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45158400 + 8838729 = 6720^2 + 2973^2 .

It is not a de Polignac number, because 53997129 - 2¹ = 53997127 is a prime.

It is a Curzon 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 5 ways as a sum of consecutive naturals, for example, 2999832 + ... + 2999849.

It is an arithmetic number, because the mean of its divisors is an integer number (12999311).

Almost surely, 2^53997129 is an apocalyptic number.

It is an amenable number.

53997129 is a deficient number, since it is larger than the sum of its proper divisors (23998737).

53997129 is a wasteful number, since it uses less digits than its factorization.

53997129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999687 (or 5999684 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 53997129 is about 7348.2738789460. The cubic root of 53997129 is about 377.9696162695.

The spelling of 53997129 in words is "fifty-three million, nine hundred ninety-seven thousand, one hundred twenty-nine".