400550207 has 2 divisors, whose sum is σ = 400550208. Its totient is φ = 400550206.

The previous prime is 400550201. The next prime is 400550299. The reversal of 400550207 is 702055004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400550207 - 2¹⁰ = 400549183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400550201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200275103 + 200275104.

It is an arithmetic number, because the mean of its divisors is an integer number (200275104).

Almost surely, 2^400550207 is an apocalyptic number.

400550207 is a deficient number, since it is larger than the sum of its proper divisors (1).

400550207 is an equidigital number, since it uses as much as digits as its factorization.

400550207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 400550207 is about 20013.7504481294. The cubic root of 400550207 is about 737.1439749358.

The spelling of 400550207 in words is "four hundred million, five hundred fifty thousand, two hundred seven".