400204369 has 2 divisors, whose sum is σ = 400204370. Its totient is φ = 400204368.

The previous prime is 400204349. The next prime is 400204411. The reversal of 400204369 is 963402004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250019344 + 150185025 = 15812^2 + 12255^2 .

It is a cyclic number.

It is not a de Polignac number, because 400204369 - 2²¹ = 398107217 is a prime.

It is a super-2 number, since 2×400204369² = 320327073933376322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400204309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200102184 + 200102185.

It is an arithmetic number, because the mean of its divisors is an integer number (200102185).

Almost surely, 2^400204369 is an apocalyptic number.

It is an amenable number.

400204369 is a deficient number, since it is larger than the sum of its proper divisors (1).

400204369 is an equidigital number, since it uses as much as digits as its factorization.

400204369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 400204369 is about 20005.1085725622. The cubic root of 400204369 is about 736.9317620022.

The spelling of 400204369 in words is "four hundred million, two hundred four thousand, three hundred sixty-nine".