123555583 has 2 divisors, whose sum is σ = 123555584. Its totient is φ = 123555582.

The previous prime is 123555581. The next prime is 123555587. The reversal of 123555583 is 385555321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123555583 - 2¹ = 123555581 is a prime.

Together with 123555581, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123555581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61777791 + 61777792.

It is an arithmetic number, because the mean of its divisors is an integer number (61777792).

Almost surely, 2^123555583 is an apocalyptic number.

123555583 is a deficient number, since it is larger than the sum of its proper divisors (1).

123555583 is an equidigital number, since it uses as much as digits as its factorization.

123555583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90000, while the sum is 37.

The square root of 123555583 is about 11115.5559015283. Note that the first 3 decimals coincide. The cubic root of 123555583 is about 498.0666445758.

The spelling of 123555583 in words is "one hundred twenty-three million, five hundred fifty-five thousand, five hundred eighty-three".