400002311 has 2 divisors, whose sum is σ = 400002312. Its totient is φ = 400002310.

The previous prime is 400002293. The next prime is 400002341. The reversal of 400002311 is 113200004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400002311 - 2⁶ = 400002247 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 400002292 and 400002301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400002341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200001155 + 200001156.

It is an arithmetic number, because the mean of its divisors is an integer number (200001156).

Almost surely, 2^400002311 is an apocalyptic number.

400002311 is a deficient number, since it is larger than the sum of its proper divisors (1).

400002311 is an equidigital number, since it uses as much as digits as its factorization.

400002311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 400002311 is about 20000.0577749166. The cubic root of 400002311 is about 736.8077186915.

Adding to 400002311 its reverse (113200004), we get a palindrome (513202315).

The spelling of 400002311 in words is "four hundred million, two thousand, three hundred eleven".