406866673 has 2 divisors, whose sum is σ = 406866674. Its totient is φ = 406866672.

The previous prime is 406866671. The next prime is 406866721. The reversal of 406866673 is 376668604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363741184 + 43125489 = 19072^2 + 6567^2 .

It is a cyclic number.

It is not a de Polignac number, because 406866673 - 2¹ = 406866671 is a prime.

Together with 406866671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (406866671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203433336 + 203433337.

It is an arithmetic number, because the mean of its divisors is an integer number (203433337).

Almost surely, 2^406866673 is an apocalyptic number.

It is an amenable number.

406866673 is a deficient number, since it is larger than the sum of its proper divisors (1).

406866673 is an equidigital number, since it uses as much as digits as its factorization.

406866673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 46.

The square root of 406866673 is about 20170.9363441562. The cubic root of 406866673 is about 740.9985745852.

The spelling of 406866673 in words is "four hundred six million, eight hundred sixty-six thousand, six hundred seventy-three".