400207 has 2 divisors, whose sum is σ = 400208. Its totient is φ = 400206.

The previous prime is 400199. The next prime is 400217. The reversal of 400207 is 702004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400207 - 2³ = 400199 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200103 + 200104.

It is an arithmetic number, because the mean of its divisors is an integer number (200104).

2⁴⁰⁰²⁰⁷ is an apocalyptic number.

400207 is a deficient number, since it is larger than the sum of its proper divisors (1).

400207 is an equidigital number, since it uses as much as digits as its factorization.

400207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 400207 is about 632.6191587361. The cubic root of 400207 is about 73.6933376896.

The spelling of 400207 in words is "four hundred thousand, two hundred seven", and thus it is an iban number.