531623 has 2 divisors, whose sum is σ = 531624. Its totient is φ = 531622.

The previous prime is 531613. The next prime is 531631. The reversal of 531623 is 326135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531623 - 2¹⁰ = 530599 is a prime.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 531595 and 531604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265811 + 265812.

It is an arithmetic number, because the mean of its divisors is an integer number (265812).

2⁵³¹⁶²³ is an apocalyptic number.

531623 is a deficient number, since it is larger than the sum of its proper divisors (1).

531623 is an equidigital number, since it uses as much as digits as its factorization.

531623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 20.

The square root of 531623 is about 729.1248178467. The cubic root of 531623 is about 81.0092455026.

Adding to 531623 its reverse (326135), we get a palindrome (857758).

The spelling of 531623 in words is "five hundred thirty-one thousand, six hundred twenty-three".