400009163 has 2 divisors, whose sum is σ = 400009164. Its totient is φ = 400009162.

The previous prime is 400009097. The next prime is 400009171. The reversal of 400009163 is 361900004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400009163 - 2¹⁰ = 400008139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (400009193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200004581 + 200004582.

It is an arithmetic number, because the mean of its divisors is an integer number (200004582).

Almost surely, 2^400009163 is an apocalyptic number.

400009163 is a deficient number, since it is larger than the sum of its proper divisors (1).

400009163 is an equidigital number, since it uses as much as digits as its factorization.

400009163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 400009163 is about 20000.2290736881. The cubic root of 400009163 is about 736.8119258152.

Adding to 400009163 its reverse (361900004), we get a palindrome (761909167).

The spelling of 400009163 in words is "four hundred million, nine thousand, one hundred sixty-three".