53644993 has 4 divisors (see below), whose sum is σ = 55977408. Its totient is φ = 51312580.

The previous prime is 53644991. The next prime is 53645003. The reversal of 53644993 is 39944635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53644993 - 2¹ = 53644991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53644991) 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, 1166173 + ... + 1166218.

It is an arithmetic number, because the mean of its divisors is an integer number (13994352).

Almost surely, 2^53644993 is an apocalyptic number.

It is an amenable number.

53644993 is a deficient number, since it is larger than the sum of its proper divisors (2332415).

53644993 is a wasteful number, since it uses less digits than its factorization.

53644993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332414.

The product of its digits is 349920, while the sum is 43.

The square root of 53644993 is about 7324.2742302565. The cubic root of 53644993 is about 377.1461954138.

The spelling of 53644993 in words is "fifty-three million, six hundred forty-four thousand, nine hundred ninety-three".