53709393 has 8 divisors (see below), whose sum is σ = 74726208. Its totient is φ = 34249424.

The previous prime is 53709379. The next prime is 53709401. The reversal of 53709393 is 39390735.

It is a happy number.

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 53709393 - 2⁵ = 53709361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53709353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389130 + ... + 389267.

It is an arithmetic number, because the mean of its divisors is an integer number (9340776).

Almost surely, 2^53709393 is an apocalyptic number.

It is an amenable number.

53709393 is a deficient number, since it is larger than the sum of its proper divisors (21016815).

53709393 is a wasteful number, since it uses less digits than its factorization.

53709393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778423.

The product of its (nonzero) digits is 76545, while the sum is 39.

The square root of 53709393 is about 7328.6692516445. The cubic root of 53709393 is about 377.2970544899.

The spelling of 53709393 in words is "fifty-three million, seven hundred nine thousand, three hundred ninety-three".