53609783 has 4 divisors (see below), whose sum is σ = 54255768. Its totient is φ = 52963800.

The previous prime is 53609779. The next prime is 53609791. The reversal of 53609783 is 38790635.

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

It is a cyclic number.

It is not a de Polignac number, because 53609783 - 2² = 53609779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53609783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53609713) 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, 322868 + ... + 323033.

It is an arithmetic number, because the mean of its divisors is an integer number (13563942).

Almost surely, 2^53609783 is an apocalyptic number.

53609783 is a deficient number, since it is larger than the sum of its proper divisors (645985).

53609783 is an equidigital number, since it uses as much as digits as its factorization.

53609783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645984.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 53609783 is about 7321.8701845908. The cubic root of 53609783 is about 377.0636637977.

The spelling of 53609783 in words is "fifty-three million, six hundred nine thousand, seven hundred eighty-three".