400608841 has 2 divisors, whose sum is σ = 400608842. Its totient is φ = 400608840.

The previous prime is 400608839. The next prime is 400608851. The reversal of 400608841 is 148806004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384003216 + 16605625 = 19596^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 400608841 - 2¹ = 400608839 is a prime.

Together with 400608839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (400608811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200304420 + 200304421.

It is an arithmetic number, because the mean of its divisors is an integer number (200304421).

Almost surely, 2^400608841 is an apocalyptic number.

It is an amenable number.

400608841 is a deficient number, since it is larger than the sum of its proper divisors (1).

400608841 is an equidigital number, since it uses as much as digits as its factorization.

400608841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 400608841 is about 20015.2152374138. The cubic root of 400608841 is about 737.1799417886.

The spelling of 400608841 in words is "four hundred million, six hundred eight thousand, eight hundred forty-one".