406626503 has 2 divisors, whose sum is σ = 406626504. Its totient is φ = 406626502.

The previous prime is 406626491. The next prime is 406626529. The reversal of 406626503 is 305626604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406626503 - 2⁶ = 406626439 is a prime.

It is a super-2 number, since 2×406626503² = 330690225884018018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 406626503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406620503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203313251 + 203313252.

It is an arithmetic number, because the mean of its divisors is an integer number (203313252).

Almost surely, 2^406626503 is an apocalyptic number.

406626503 is a deficient number, since it is larger than the sum of its proper divisors (1).

406626503 is an equidigital number, since it uses as much as digits as its factorization.

406626503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 406626503 is about 20164.9820976861. The cubic root of 406626503 is about 740.8527441300.

The spelling of 406626503 in words is "four hundred six million, six hundred twenty-six thousand, five hundred three".