56567989 has 4 divisors (see below), whose sum is σ = 56725920. Its totient is φ = 56410060.

The previous prime is 56567983. The next prime is 56568019. The reversal of 56567989 is 98976565.

It is a happy number.

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 56567989 - 2³ = 56567981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56567981) 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, 78427 + ... + 79144.

It is an arithmetic number, because the mean of its divisors is an integer number (14181480).

Almost surely, 2^56567989 is an apocalyptic number.

It is an amenable number.

56567989 is a deficient number, since it is larger than the sum of its proper divisors (157931).

56567989 is a wasteful number, since it uses less digits than its factorization.

56567989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157930.

The product of its digits is 4082400, while the sum is 55.

The square root of 56567989 is about 7521.1693904605. The cubic root of 56567989 is about 383.8753687156.

The spelling of 56567989 in words is "fifty-six million, five hundred sixty-seven thousand, nine hundred eighty-nine".