400001113 has 2 divisors, whose sum is σ = 400001114. Its totient is φ = 400001112.

The previous prime is 400001111. The next prime is 400001137. The reversal of 400001113 is 311100004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399880009 + 121104 = 19997^2 + 348^2 .

It is a cyclic number.

It is not a de Polignac number, because 400001113 - 2¹ = 400001111 is a prime.

Together with 400001111, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 400001113.

It is not a weakly prime, because it can be changed into another prime (400001111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200000556 + 200000557.

It is an arithmetic number, because the mean of its divisors is an integer number (200000557).

Almost surely, 2^400001113 is an apocalyptic number.

It is an amenable number.

400001113 is a deficient number, since it is larger than the sum of its proper divisors (1).

400001113 is an equidigital number, since it uses as much as digits as its factorization.

400001113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 400001113 is about 20000.0278249806. The cubic root of 400001113 is about 736.8069831153.

Adding to 400001113 its reverse (311100004), we get a palindrome (711101117).

The spelling of 400001113 in words is "four hundred million, one thousand, one hundred thirteen".