5640623 has 2 divisors, whose sum is σ = 5640624. Its totient is φ = 5640622.

The previous prime is 5640619. The next prime is 5640629. The reversal of 5640623 is 3260465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5640623 - 2² = 5640619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5640592 and 5640601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5640629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820311 + 2820312.

It is an arithmetic number, because the mean of its divisors is an integer number (2820312).

Almost surely, 2^5640623 is an apocalyptic number.

5640623 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640623 is an equidigital number, since it uses as much as digits as its factorization.

5640623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 5640623 is about 2374.9995789473. Note that the first 3 decimals coincide. The cubic root of 5640623 is about 178.0091629336.

The spelling of 5640623 in words is "five million, six hundred forty thousand, six hundred twenty-three".