406624693 has 2 divisors, whose sum is σ = 406624694. Its totient is φ = 406624692.

The previous prime is 406624651. The next prime is 406624711. The reversal of 406624693 is 396426604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366454449 + 40170244 = 19143^2 + 6338^2 .

It is a cyclic number.

It is not a de Polignac number, because 406624693 - 2⁹ = 406624181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406624633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203312346 + 203312347.

It is an arithmetic number, because the mean of its divisors is an integer number (203312347).

Almost surely, 2^406624693 is an apocalyptic number.

It is an amenable number.

406624693 is a deficient number, since it is larger than the sum of its proper divisors (1).

406624693 is an equidigital number, since it uses as much as digits as its factorization.

406624693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 406624693 is about 20164.9372178542. The cubic root of 406624693 is about 740.8516448859.

The spelling of 406624693 in words is "four hundred six million, six hundred twenty-four thousand, six hundred ninety-three".