55609823 has 2 divisors, whose sum is σ = 55609824. Its totient is φ = 55609822.

The previous prime is 55609811. The next prime is 55609843. The reversal of 55609823 is 32890655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55609823 - 2¹² = 55605727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55609843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27804911 + 27804912.

It is an arithmetic number, because the mean of its divisors is an integer number (27804912).

Almost surely, 2^55609823 is an apocalyptic number.

55609823 is a deficient number, since it is larger than the sum of its proper divisors (1).

55609823 is an equidigital number, since it uses as much as digits as its factorization.

55609823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 55609823 is about 7457.1994072842. The cubic root of 55609823 is about 381.6956151859.

The spelling of 55609823 in words is "fifty-five million, six hundred nine thousand, eight hundred twenty-three".