591623 has 2 divisors, whose sum is σ = 591624. Its totient is φ = 591622.

The previous prime is 591611. The next prime is 591649. The reversal of 591623 is 326195.

It is an a-pointer prime, because the next prime (591649) can be obtained adding 591623 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 591623 - 2⁶ = 591559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 591592 and 591601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (591653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295811 + 295812.

It is an arithmetic number, because the mean of its divisors is an integer number (295812).

2⁵⁹¹⁶²³ is an apocalyptic number.

591623 is a deficient number, since it is larger than the sum of its proper divisors (1).

591623 is an equidigital number, since it uses as much as digits as its factorization.

591623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 591623 is about 769.1703322412. The cubic root of 591623 is about 83.9489012727.

The spelling of 591623 in words is "five hundred ninety-one thousand, six hundred twenty-three".