53531989 has 4 divisors (see below), whose sum is σ = 61179424. Its totient is φ = 45884556.

The previous prime is 53531981. The next prime is 53532001. The reversal of 53531989 is 98913535.

53531989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53531989 - 2³ = 53531981 is a prime.

It is a super-2 number, since 2×53531989² = 5731347692592242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53531981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3823707 + ... + 3823720.

It is an arithmetic number, because the mean of its divisors is an integer number (15294856).

Almost surely, 2^53531989 is an apocalyptic number.

It is an amenable number.

53531989 is a deficient number, since it is larger than the sum of its proper divisors (7647435).

53531989 is an equidigital number, since it uses as much as digits as its factorization.

53531989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7647434.

The product of its digits is 145800, while the sum is 43.

The square root of 53531989 is about 7316.5558154093. Note that the first 3 decimals coincide. The cubic root of 53531989 is about 376.8811878320.

The spelling of 53531989 in words is "fifty-three million, five hundred thirty-one thousand, nine hundred eighty-nine".