400422247 has 2 divisors, whose sum is σ = 400422248. Its totient is φ = 400422246.

The previous prime is 400422181. The next prime is 400422263. The reversal of 400422247 is 742224004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400422247 - 2²³ = 392033639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400422047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200211123 + 200211124.

It is an arithmetic number, because the mean of its divisors is an integer number (200211124).

Almost surely, 2^400422247 is an apocalyptic number.

400422247 is a deficient number, since it is larger than the sum of its proper divisors (1).

400422247 is an equidigital number, since it uses as much as digits as its factorization.

400422247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 400422247 is about 20010.5533906486. The cubic root of 400422247 is about 737.0654704291.

The spelling of 400422247 in words is "four hundred million, four hundred twenty-two thousand, two hundred forty-seven".