1243432323 has 32 divisors (see below), whose sum is σ = 2162193920. Its totient is φ = 691325280.

The previous prime is 1243432277. The next prime is 1243432327. The reversal of 1243432323 is 3232343421.

It is not a de Polignac number, because 1243432323 - 2⁶ = 1243432259 is a prime.

It is a super-2 number, since 2×1243432323² = 3092247883762352658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243432327) 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 31 ways as a sum of consecutive naturals, for example, 81913 + ... + 95898.

It is an arithmetic number, because the mean of its divisors is an integer number (67568560).

Almost surely, 2^1243432323 is an apocalyptic number.

1243432323 is a deficient number, since it is larger than the sum of its proper divisors (918761597).

1243432323 is a wasteful number, since it uses less digits than its factorization.

1243432323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177864 (or 177858 counting only the distinct ones).

The product of its digits is 10368, while the sum is 27.

The square root of 1243432323 is about 35262.3357564413. The cubic root of 1243432323 is about 1075.3274136638.

Adding to 1243432323 its reverse (3232343421), we get a palindrome (4475775744).

The spelling of 1243432323 in words is "one billion, two hundred forty-three million, four hundred thirty-two thousand, three hundred twenty-three".