400004452469 has 2 divisors, whose sum is σ = 400004452470. Its totient is φ = 400004452468.

The previous prime is 400004452403. The next prime is 400004452517. The reversal of 400004452469 is 964254400004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381361827025 + 18642625444 = 617545^2 + 136538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400004452469 is a prime.

It is a super-2 number, since 2×400004452469² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400004352469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200002226234 + 200002226235.

It is an arithmetic number, because the mean of its divisors is an integer number (200002226235).

Almost surely, 2^400004452469 is an apocalyptic number.

It is an amenable number.

400004452469 is a deficient number, since it is larger than the sum of its proper divisors (1).

400004452469 is an equidigital number, since it uses as much as digits as its factorization.

400004452469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 400004452469 in words is "four hundred billion, four million, four hundred fifty-two thousand, four hundred sixty-nine".