56390443 has 2 divisors, whose sum is σ = 56390444. Its totient is φ = 56390442.

The previous prime is 56390429. The next prime is 56390447. The reversal of 56390443 is 34409365.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56390443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56390399 and 56390408.

It is not a weakly prime, because it can be changed into another prime (56390447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28195221 + 28195222.

It is an arithmetic number, because the mean of its divisors is an integer number (28195222).

Almost surely, 2^56390443 is an apocalyptic number.

56390443 is a deficient number, since it is larger than the sum of its proper divisors (1).

56390443 is an equidigital number, since it uses as much as digits as its factorization.

56390443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 56390443 is about 7509.3570297330. The cubic root of 56390443 is about 383.4733335303.

The spelling of 56390443 in words is "fifty-six million, three hundred ninety thousand, four hundred forty-three".