53644989 has 8 divisors (see below), whose sum is σ = 71699040. Its totient is φ = 35677136.

The previous prime is 53644967. The next prime is 53644991. The reversal of 53644989 is 98944635.

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 53644989 - 2⁷ = 53644861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53644919) 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, 20082 + ... + 22595.

It is an arithmetic number, because the mean of its divisors is an integer number (8962380).

Almost surely, 2^53644989 is an apocalyptic number.

It is an amenable number.

53644989 is a deficient number, since it is larger than the sum of its proper divisors (18054051).

53644989 is a wasteful number, since it uses less digits than its factorization.

53644989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43099.

The product of its digits is 933120, while the sum is 48.

The square root of 53644989 is about 7324.2739571919. The cubic root of 53644989 is about 377.1461860399.

The spelling of 53644989 in words is "fifty-three million, six hundred forty-four thousand, nine hundred eighty-nine".