53720689 has 4 divisors (see below), whose sum is σ = 58604400. Its totient is φ = 48836980.

The previous prime is 53720677. The next prime is 53720743. The reversal of 53720689 is 98602735.

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 53720689 - 2¹¹ = 53718641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53720669) 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, 2441839 + ... + 2441860.

It is an arithmetic number, because the mean of its divisors is an integer number (14651100).

Almost surely, 2^53720689 is an apocalyptic number.

It is an amenable number.

53720689 is a deficient number, since it is larger than the sum of its proper divisors (4883711).

53720689 is a wasteful number, since it uses less digits than its factorization.

53720689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4883710.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 53720689 is about 7329.4398831016. The cubic root of 53720689 is about 377.3235033011.

The spelling of 53720689 in words is "fifty-three million, seven hundred twenty thousand, six hundred eighty-nine".