400536361 has 2 divisors, whose sum is σ = 400536362. Its totient is φ = 400536360.

The previous prime is 400536341. The next prime is 400536373. The reversal of 400536361 is 163635004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348046336 + 52490025 = 18656^2 + 7245^2 .

It is a cyclic number.

It is not a de Polignac number, because 400536361 - 2¹¹ = 400534313 is a prime.

It is not a weakly prime, because it can be changed into another prime (400536341) 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, 200268180 + 200268181.

It is an arithmetic number, because the mean of its divisors is an integer number (200268181).

Almost surely, 2^400536361 is an apocalyptic number.

It is an amenable number.

400536361 is a deficient number, since it is larger than the sum of its proper divisors (1).

400536361 is an equidigital number, since it uses as much as digits as its factorization.

400536361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 400536361 is about 20013.4045329624. The cubic root of 400536361 is about 737.1354811083.

The spelling of 400536361 in words is "four hundred million, five hundred thirty-six thousand, three hundred sixty-one".