404975429 has 2 divisors, whose sum is σ = 404975430. Its totient is φ = 404975428.

The previous prime is 404975407. The next prime is 404975447. The reversal of 404975429 is 924579404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396408100 + 8567329 = 19910^2 + 2927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404975429 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404975429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404975449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202487714 + 202487715.

It is an arithmetic number, because the mean of its divisors is an integer number (202487715).

Almost surely, 2^404975429 is an apocalyptic number.

It is an amenable number.

404975429 is a deficient number, since it is larger than the sum of its proper divisors (1).

404975429 is an equidigital number, since it uses as much as digits as its factorization.

404975429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 404975429 is about 20124.0013168356. The cubic root of 404975429 is about 739.8486597010.

The spelling of 404975429 in words is "four hundred four million, nine hundred seventy-five thousand, four hundred twenty-nine".