404143247 has 2 divisors, whose sum is σ = 404143248. Its totient is φ = 404143246.

The previous prime is 404143237. The next prime is 404143291. The reversal of 404143247 is 742341404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404143247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404143237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202071623 + 202071624.

It is an arithmetic number, because the mean of its divisors is an integer number (202071624).

Almost surely, 2^404143247 is an apocalyptic number.

404143247 is a deficient number, since it is larger than the sum of its proper divisors (1).

404143247 is an equidigital number, since it uses as much as digits as its factorization.

404143247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 404143247 is about 20103.3143287369. The cubic root of 404143247 is about 739.3415417373.

The spelling of 404143247 in words is "four hundred four million, one hundred forty-three thousand, two hundred forty-seven".