56989643 has 4 divisors (see below), whose sum is σ = 57057000. Its totient is φ = 56922288.

The previous prime is 56989609. The next prime is 56989697. The reversal of 56989643 is 34698965.

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

It is a cyclic number.

It is not a de Polignac number, because 56989643 - 2⁶ = 56989579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56989591 and 56989600.

It is not an unprimeable number, because it can be changed into a prime (56988643) 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, 32393 + ... + 34106.

It is an arithmetic number, because the mean of its divisors is an integer number (14264250).

Almost surely, 2^56989643 is an apocalyptic number.

56989643 is a deficient number, since it is larger than the sum of its proper divisors (67357).

56989643 is an equidigital number, since it uses as much as digits as its factorization.

56989643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67356.

The product of its digits is 1399680, while the sum is 50.

The square root of 56989643 is about 7549.1484950291. The cubic root of 56989643 is about 384.8268024022.

The spelling of 56989643 in words is "fifty-six million, nine hundred eighty-nine thousand, six hundred forty-three".