40406503 has 2 divisors, whose sum is σ = 40406504. Its totient is φ = 40406502.

The previous prime is 40406497. The next prime is 40406533. The reversal of 40406503 is 30560404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40406503 - 2¹³ = 40398311 is a prime.

It is a super-3 number, since 3×40406503³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40406533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20203251 + 20203252.

It is an arithmetic number, because the mean of its divisors is an integer number (20203252).

Almost surely, 2^40406503 is an apocalyptic number.

40406503 is a deficient number, since it is larger than the sum of its proper divisors (1).

40406503 is an equidigital number, since it uses as much as digits as its factorization.

40406503 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 40406503 is about 6356.6109681182. The cubic root of 40406503 is about 343.1498040912.

Adding to 40406503 its reverse (30560404), we get a palindrome (70966907).

The spelling of 40406503 in words is "forty million, four hundred six thousand, five hundred three".