1400243311 has 4 divisors (see below), whose sum is σ = 1400434992. Its totient is φ = 1400051632.

The previous prime is 1400243293. The next prime is 1400243333. The reversal of 1400243311 is 1133420041.

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 1400243311 - 2⁹ = 1400242799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400273311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84430 + ... + 99643.

It is an arithmetic number, because the mean of its divisors is an integer number (350108748).

Almost surely, 2^1400243311 is an apocalyptic number.

1400243311 is a deficient number, since it is larger than the sum of its proper divisors (191681).

1400243311 is an equidigital number, since it uses as much as digits as its factorization.

1400243311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191680.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1400243311 is about 37419.8251064860. The cubic root of 1400243311 is about 1118.7537453096.

Adding to 1400243311 its reverse (1133420041), we get a palindrome (2533663352).

The spelling of 1400243311 in words is "one billion, four hundred million, two hundred forty-three thousand, three hundred eleven".