5640403 has 2 divisors, whose sum is σ = 5640404. Its totient is φ = 5640402.

The previous prime is 5640389. The next prime is 5640409. The reversal of 5640403 is 3040465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5640403 - 2¹⁷ = 5509331 is a prime.

It is a super-3 number, since 3×5640403³ (a number of 21 digits) contains 333 as substring.

5640403 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5640409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820201 + 2820202.

It is an arithmetic number, because the mean of its divisors is an integer number (2820202).

Almost surely, 2^5640403 is an apocalyptic number.

5640403 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640403 is an equidigital number, since it uses as much as digits as its factorization.

5640403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 5640403 is about 2374.9532626980. The cubic root of 5640403 is about 178.0068486192.

Adding to 5640403 its reverse (3040465), we get a palindrome (8680868).

The spelling of 5640403 in words is "five million, six hundred forty thousand, four hundred three".