56678009 has 4 divisors (see below), whose sum is σ = 56898804. Its totient is φ = 56457216.

The previous prime is 56677991. The next prime is 56678053. The reversal of 56678009 is 90087665.

It is a happy number.

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 55950400 + 727609 = 7480^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 56678009 - 2¹² = 56673913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56678309) 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, 110012 + ... + 110525.

It is an arithmetic number, because the mean of its divisors is an integer number (14224701).

Almost surely, 2^56678009 is an apocalyptic number.

It is an amenable number.

56678009 is a deficient number, since it is larger than the sum of its proper divisors (220795).

56678009 is a wasteful number, since it uses less digits than its factorization.

56678009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220794.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 56678009 is about 7528.4798598389. The cubic root of 56678009 is about 384.1240760254.

The spelling of 56678009 in words is "fifty-six million, six hundred seventy-eight thousand, nine".