400207943 has 2 divisors, whose sum is σ = 400207944. Its totient is φ = 400207942.

The previous prime is 400207937. The next prime is 400207949. The reversal of 400207943 is 349702004.

It is a balanced prime because it is at equal distance from previous prime (400207937) and next prime (400207949).

It is a cyclic number.

It is not a de Polignac number, because 400207943 - 2⁶ = 400207879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400207949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200103971 + 200103972.

It is an arithmetic number, because the mean of its divisors is an integer number (200103972).

Almost surely, 2^400207943 is an apocalyptic number.

400207943 is a deficient number, since it is larger than the sum of its proper divisors (1).

400207943 is an equidigital number, since it uses as much as digits as its factorization.

400207943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 400207943 is about 20005.1978995460. The cubic root of 400207943 is about 736.9339557033.

Adding to 400207943 its reverse (349702004), we get a palindrome (749909947).

The spelling of 400207943 in words is "four hundred million, two hundred seven thousand, nine hundred forty-three".