55643459 has 2 divisors, whose sum is σ = 55643460. Its totient is φ = 55643458.

The previous prime is 55643453. The next prime is 55643461. The reversal of 55643459 is 95434655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55643459 is a prime.

It is a Sophie Germain prime.

Together with 55643461, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55643453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27821729 + 27821730.

It is an arithmetic number, because the mean of its divisors is an integer number (27821730).

Almost surely, 2^55643459 is an apocalyptic number.

55643459 is a deficient number, since it is larger than the sum of its proper divisors (1).

55643459 is an equidigital number, since it uses as much as digits as its factorization.

55643459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 41.

The square root of 55643459 is about 7459.4543366120. The cubic root of 55643459 is about 381.7725567846.

The spelling of 55643459 in words is "fifty-five million, six hundred forty-three thousand, four hundred fifty-nine".