53408693 has 8 divisors (see below), whose sum is σ = 58076928. Its totient is φ = 48820464.

The previous prime is 53408689. The next prime is 53408701. The reversal of 53408693 is 39680435.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53408693 - 2² = 53408689 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53402693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18605 + ... + 21282.

It is an arithmetic number, because the mean of its divisors is an integer number (7259616).

Almost surely, 2^53408693 is an apocalyptic number.

It is an amenable number.

53408693 is a deficient number, since it is larger than the sum of its proper divisors (4668235).

53408693 is a wasteful number, since it uses less digits than its factorization.

53408693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40003.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 53408693 is about 7308.1251357650. The cubic root of 53408693 is about 376.5916185181.

The spelling of 53408693 in words is "fifty-three million, four hundred eight thousand, six hundred ninety-three".