404371999 has 2 divisors, whose sum is σ = 404372000. Its totient is φ = 404371998.

The previous prime is 404371949. The next prime is 404372011. The reversal of 404371999 is 999173404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404371999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404371949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202185999 + 202186000.

It is an arithmetic number, because the mean of its divisors is an integer number (202186000).

Almost surely, 2^404371999 is an apocalyptic number.

404371999 is a deficient number, since it is larger than the sum of its proper divisors (1).

404371999 is an equidigital number, since it uses as much as digits as its factorization.

404371999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 404371999 is about 20109.0029340094. The cubic root of 404371999 is about 739.4810087525.

It can be divided in two parts, 40437 and 1999, that added together give a square (42436 = 206²).

The spelling of 404371999 in words is "four hundred four million, three hundred seventy-one thousand, nine hundred ninety-nine".