1400311811 has 4 divisors (see below), whose sum is σ = 1482683112. Its totient is φ = 1317940512.

The previous prime is 1400311807. The next prime is 1400311823. The reversal of 1400311811 is 1181130041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1400311811 - 2² = 1400311807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400331811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41185625 + ... + 41185658.

It is an arithmetic number, because the mean of its divisors is an integer number (370670778).

Almost surely, 2^1400311811 is an apocalyptic number.

1400311811 is a deficient number, since it is larger than the sum of its proper divisors (82371301).

1400311811 is an equidigital number, since it uses as much as digits as its factorization.

1400311811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82371300.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 1400311811 is about 37420.7403855135. The cubic root of 1400311811 is about 1118.7719881824.

Adding to 1400311811 its reverse (1181130041), we get a palindrome (2581441852).

The spelling of 1400311811 in words is "one billion, four hundred million, three hundred eleven thousand, eight hundred eleven".