400271849 has 2 divisors, whose sum is σ = 400271850. Its totient is φ = 400271848.

The previous prime is 400271791. The next prime is 400271863. The reversal of 400271849 is 948172004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400200025 + 71824 = 20005^2 + 268^2 .

It is a cyclic number.

It is not a de Polignac number, because 400271849 - 2⁸ = 400271593 is a prime.

It is not a weakly prime, because it can be changed into another prime (400271549) 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, 200135924 + 200135925.

It is an arithmetic number, because the mean of its divisors is an integer number (200135925).

Almost surely, 2^400271849 is an apocalyptic number.

It is an amenable number.

400271849 is a deficient number, since it is larger than the sum of its proper divisors (1).

400271849 is an equidigital number, since it uses as much as digits as its factorization.

400271849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 400271849 is about 20006.7950706754. The cubic root of 400271849 is about 736.9731786420.

The spelling of 400271849 in words is "four hundred million, two hundred seventy-one thousand, eight hundred forty-nine".