400287343 has 2 divisors, whose sum is σ = 400287344. Its totient is φ = 400287342.

The previous prime is 400287311. The next prime is 400287347. The reversal of 400287343 is 343782004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400287343 - 2⁵ = 400287311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400287347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200143671 + 200143672.

It is an arithmetic number, because the mean of its divisors is an integer number (200143672).

Almost surely, 2^400287343 is an apocalyptic number.

400287343 is a deficient number, since it is larger than the sum of its proper divisors (1).

400287343 is an equidigital number, since it uses as much as digits as its factorization.

400287343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 400287343 is about 20007.1822853694. The cubic root of 400287343 is about 736.9826876088.

The spelling of 400287343 in words is "four hundred million, two hundred eighty-seven thousand, three hundred forty-three".