400047667 has 2 divisors, whose sum is σ = 400047668. Its totient is φ = 400047666.

The previous prime is 400047649. The next prime is 400047731. The reversal of 400047667 is 766740004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400047667 - 2¹¹ = 400045619 is a prime.

It is not a weakly prime, because it can be changed into another prime (400047607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200023833 + 200023834.

It is an arithmetic number, because the mean of its divisors is an integer number (200023834).

Almost surely, 2^400047667 is an apocalyptic number.

400047667 is a deficient number, since it is larger than the sum of its proper divisors (1).

400047667 is an equidigital number, since it uses as much as digits as its factorization.

400047667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 400047667 is about 20001.1916394999. The cubic root of 400047667 is about 736.8355663538.

The spelling of 400047667 in words is "four hundred million, forty-seven thousand, six hundred sixty-seven".