53321989 has 4 divisors (see below), whose sum is σ = 60939424. Its totient is φ = 45704556.

The previous prime is 53321977. The next prime is 53321993. The reversal of 53321989 is 98912335.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98912335 = 5 ⋅19782467.

It is a cyclic number.

It is not a de Polignac number, because 53321989 - 2⁷ = 53321861 is a prime.

It is a super-2 number, since 2×53321989² = 5686469021832242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53321969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3808707 + ... + 3808720.

It is an arithmetic number, because the mean of its divisors is an integer number (15234856).

Almost surely, 2^53321989 is an apocalyptic number.

It is an amenable number.

53321989 is a deficient number, since it is larger than the sum of its proper divisors (7617435).

53321989 is an equidigital number, since it uses as much as digits as its factorization.

53321989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7617434.

The product of its digits is 58320, while the sum is 40.

The square root of 53321989 is about 7302.1906986876. The cubic root of 53321989 is about 376.3877210939.

It can be divided in two parts, 533 and 21989, that added together give a palindrome (22522).

The spelling of 53321989 in words is "fifty-three million, three hundred twenty-one thousand, nine hundred eighty-nine".