1234400443 has 4 divisors (see below), whose sum is σ = 1234483128. Its totient is φ = 1234317760.

The previous prime is 1234400353. The next prime is 1234400449. The reversal of 1234400443 is 3440044321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1234400443 - 2²⁵ = 1200846011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1234400449) 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 in 3 ways as a sum of consecutive naturals, for example, 12013 + ... + 51118.

It is an arithmetic number, because the mean of its divisors is an integer number (308620782).

Almost surely, 2^1234400443 is an apocalyptic number.

1234400443 is a deficient number, since it is larger than the sum of its proper divisors (82685).

1234400443 is an equidigital number, since it uses as much as digits as its factorization.

1234400443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82684.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1234400443 is about 35134.0353930487. The cubic root of 1234400443 is about 1072.7174769576.

Adding to 1234400443 its reverse (3440044321), we get a palindrome (4674444764).

The spelling of 1234400443 in words is "one billion, two hundred thirty-four million, four hundred thousand, four hundred forty-three".