53206689 has 4 divisors (see below), whose sum is σ = 70942256. Its totient is φ = 35471124.

The previous prime is 53206667. The next prime is 53206691. The reversal of 53206689 is 98660235.

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 not a de Polignac number, because 53206689 - 2⁹ = 53206177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53206639) 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, 8867779 + ... + 8867784.

It is an arithmetic number, because the mean of its divisors is an integer number (17735564).

Almost surely, 2^53206689 is an apocalyptic number.

It is an amenable number.

53206689 is a deficient number, since it is larger than the sum of its proper divisors (17735567).

53206689 is a wasteful number, since it uses less digits than its factorization.

53206689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17735566.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 53206689 is about 7294.2915351664. The cubic root of 53206689 is about 376.1162332102.

The spelling of 53206689 in words is "fifty-three million, two hundred six thousand, six hundred eighty-nine".