56843009 has 2 divisors, whose sum is σ = 56843010. Its totient is φ = 56843008.

The previous prime is 56842993. The next prime is 56843011. The reversal of 56843009 is 90034865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56670784 + 172225 = 7528^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 56843009 - 2⁴ = 56842993 is a prime.

It is a super-2 number, since 2×56843009² = 6462255344348162, which contains 22 as substring.

Together with 56843011, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56843009.

It is not a weakly prime, because it can be changed into another prime (56843029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28421504 + 28421505.

It is an arithmetic number, because the mean of its divisors is an integer number (28421505).

Almost surely, 2^56843009 is an apocalyptic number.

It is an amenable number.

56843009 is a deficient number, since it is larger than the sum of its proper divisors (1).

56843009 is an equidigital number, since it uses as much as digits as its factorization.

56843009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 56843009 is about 7539.4302835161. The cubic root of 56843009 is about 384.4964665928.

The spelling of 56843009 in words is "fifty-six million, eight hundred forty-three thousand, nine".