53999933 has 4 divisors (see below), whose sum is σ = 58153788. Its totient is φ = 49846080.

The previous prime is 53999917. The next prime is 53999963. The reversal of 53999933 is 33999935.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30448324 + 23551609 = 5518^2 + 4853^2 .

It is a cyclic number.

It is not a de Polignac number, because 53999933 - 2⁴ = 53999917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53999963) 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, 2076908 + ... + 2076933.

It is an arithmetic number, because the mean of its divisors is an integer number (14538447).

Almost surely, 2^53999933 is an apocalyptic number.

It is an amenable number.

53999933 is a deficient number, since it is larger than the sum of its proper divisors (4153855).

53999933 is a wasteful number, since it uses less digits than its factorization.

53999933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153854.

The product of its digits is 885735, while the sum is 50.

The square root of 53999933 is about 7348.4646695755. The cubic root of 53999933 is about 377.9761586449.

The spelling of 53999933 in words is "fifty-three million, nine hundred ninety-nine thousand, nine hundred thirty-three".