406624549 has 2 divisors, whose sum is σ = 406624550. Its totient is φ = 406624548.

The previous prime is 406624507. The next prime is 406624571. The reversal of 406624549 is 945426604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404733924 + 1890625 = 20118^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 406624549 - 2¹⁵ = 406591781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406624579) 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, 203312274 + 203312275.

It is an arithmetic number, because the mean of its divisors is an integer number (203312275).

Almost surely, 2^406624549 is an apocalyptic number.

It is an amenable number.

406624549 is a deficient number, since it is larger than the sum of its proper divisors (1).

406624549 is an equidigital number, since it uses as much as digits as its factorization.

406624549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 406624549 is about 20164.9336472997. The cubic root of 406624549 is about 740.8515574320.

The spelling of 406624549 in words is "four hundred six million, six hundred twenty-four thousand, five hundred forty-nine".