56009423 has 2 divisors, whose sum is σ = 56009424. Its totient is φ = 56009422.

The previous prime is 56009417. The next prime is 56009461. The reversal of 56009423 is 32490065.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56009423 - 2¹⁰ = 56008399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56009483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28004711 + 28004712.

It is an arithmetic number, because the mean of its divisors is an integer number (28004712).

Almost surely, 2^56009423 is an apocalyptic number.

56009423 is a deficient number, since it is larger than the sum of its proper divisors (1).

56009423 is an equidigital number, since it uses as much as digits as its factorization.

56009423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56009423 is about 7483.9443477354. The cubic root of 56009423 is about 382.6076943397.

Adding to 56009423 its reverse (32490065), we get a palindrome (88499488).

The spelling of 56009423 in words is "fifty-six million, nine thousand, four hundred twenty-three".