623633 has 2 divisors, whose sum is σ = 623634. Its totient is φ = 623632.

The previous prime is 623621. The next prime is 623641. The reversal of 623633 is 336326.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 588289 + 35344 = 767^2 + 188^2 .

It is a cyclic number.

It is not a de Polignac number, because 623633 - 2⁴ = 623617 is a prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 623599 and 623608.

It is not a weakly prime, because it can be changed into another prime (623653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311816 + 311817.

It is an arithmetic number, because the mean of its divisors is an integer number (311817).

2⁶²³⁶³³ is an apocalyptic number.

It is an amenable number.

623633 is a deficient number, since it is larger than the sum of its proper divisors (1).

623633 is an equidigital number, since it uses as much as digits as its factorization.

623633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 23.

The square root of 623633 is about 789.7043750670. The cubic root of 623633 is about 85.4364175095.

Adding to 623633 its reverse (336326), we get a palindrome (959959).

The spelling of 623633 in words is "six hundred twenty-three thousand, six hundred thirty-three".