404166403 has 2 divisors, whose sum is σ = 404166404. Its totient is φ = 404166402.

The previous prime is 404166401. The next prime is 404166407. The reversal of 404166403 is 304661404.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404166403 - 2¹ = 404166401 is a prime.

Together with 404166401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (404166401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202083201 + 202083202.

It is an arithmetic number, because the mean of its divisors is an integer number (202083202).

Almost surely, 2^404166403 is an apocalyptic number.

404166403 is a deficient number, since it is larger than the sum of its proper divisors (1).

404166403 is an equidigital number, since it uses as much as digits as its factorization.

404166403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 404166403 is about 20103.8902454227. The cubic root of 404166403 is about 739.3556620325.

The spelling of 404166403 in words is "four hundred four million, one hundred sixty-six thousand, four hundred three".