53543969 has 4 divisors (see below), whose sum is σ = 53569044. Its totient is φ = 53518896.

The previous prime is 53543953. The next prime is 53543981. The reversal of 53543969 is 96934535.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13690000 + 39853969 = 3700^2 + 6313^2 .

It is a cyclic number.

It is not a de Polignac number, because 53543969 - 2⁴ = 53543953 is a prime.

It is a super-2 number, since 2×53543969² = 5733913232545922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53543989) 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, 9002 + ... + 13715.

It is an arithmetic number, because the mean of its divisors is an integer number (13392261).

Almost surely, 2^53543969 is an apocalyptic number.

It is an amenable number.

53543969 is a deficient number, since it is larger than the sum of its proper divisors (25075).

53543969 is a wasteful number, since it uses less digits than its factorization.

53543969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25074.

The product of its digits is 437400, while the sum is 44.

The square root of 53543969 is about 7317.3744608295. The cubic root of 53543969 is about 376.9092999941.

The spelling of 53543969 in words is "fifty-three million, five hundred forty-three thousand, nine hundred sixty-nine".