1043440423 has 4 divisors (see below), whose sum is σ = 1098358360. Its totient is φ = 988522488.

The previous prime is 1043440417. The next prime is 1043440427. The reversal of 1043440423 is 3240443401.

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 1043440423 - 2⁹ = 1043439911 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 (1043440427) 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, 27458940 + ... + 27458977.

It is an arithmetic number, because the mean of its divisors is an integer number (274589590).

Almost surely, 2^1043440423 is an apocalyptic number.

1043440423 is a deficient number, since it is larger than the sum of its proper divisors (54917937).

1043440423 is an equidigital number, since it uses as much as digits as its factorization.

1043440423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54917936.

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

The square root of 1043440423 is about 32302.3284454852. The cubic root of 1043440423 is about 1014.2753846815.

Adding to 1043440423 its reverse (3240443401), we get a palindrome (4283883824).

The spelling of 1043440423 in words is "one billion, forty-three million, four hundred forty thousand, four hundred twenty-three".