53123661 has 8 divisors (see below), whose sum is σ = 78701760. Its totient is φ = 35415756.

The previous prime is 53123641. The next prime is 53123663. The reversal of 53123661 is 16632135.

53123661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53123661 - 2⁶ = 53123597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1967543 = 53123661 / (5 + 3 + 1 + 2 + 3 + 6 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53123663) 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 7 ways as a sum of consecutive naturals, for example, 983745 + ... + 983798.

It is an arithmetic number, because the mean of its divisors is an integer number (9837720).

Almost surely, 2^53123661 is an apocalyptic number.

It is an amenable number.

53123661 is a deficient number, since it is larger than the sum of its proper divisors (25578099).

53123661 is a wasteful number, since it uses less digits than its factorization.

53123661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967552 (or 1967546 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 53123661 is about 7288.5980133356. The cubic root of 53123661 is about 375.9204906764.

Adding to 53123661 its reverse (16632135), we get a palindrome (69755796).

The spelling of 53123661 in words is "fifty-three million, one hundred twenty-three thousand, six hundred sixty-one".