5631623 has 2 divisors, whose sum is σ = 5631624. Its totient is φ = 5631622.

The previous prime is 5631601. The next prime is 5631629. The reversal of 5631623 is 3261365.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5631623 - 2¹⁶ = 5566087 is a prime.

It is a super-2 number, since 2×5631623² = 63430355228258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 5631592 and 5631601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5631629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2815811 + 2815812.

It is an arithmetic number, because the mean of its divisors is an integer number (2815812).

Almost surely, 2^5631623 is an apocalyptic number.

5631623 is a deficient number, since it is larger than the sum of its proper divisors (1).

5631623 is an equidigital number, since it uses as much as digits as its factorization.

5631623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 26.

The square root of 5631623 is about 2373.1040853700. The cubic root of 5631623 is about 177.9144372683.

Adding to 5631623 its reverse (3261365), we get a palindrome (8892988).

The spelling of 5631623 in words is "five million, six hundred thirty-one thousand, six hundred twenty-three".