1213744423 has 4 divisors (see below), whose sum is σ = 1214733240. Its totient is φ = 1212755608.

The previous prime is 1213744391. The next prime is 1213744447. The reversal of 1213744423 is 3244473121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3244473121 = 47 ⋅69031343.

It is a cyclic number.

It is not a de Polignac number, because 1213744423 - 2⁵ = 1213744391 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 (1213744123) 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, 492565 + ... + 495022.

It is an arithmetic number, because the mean of its divisors is an integer number (303683310).

Almost surely, 2^1213744423 is an apocalyptic number.

1213744423 is a deficient number, since it is larger than the sum of its proper divisors (988817).

1213744423 is an equidigital number, since it uses as much as digits as its factorization.

1213744423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988816.

The product of its digits is 16128, while the sum is 31.

The square root of 1213744423 is about 34838.8349833917. The cubic root of 1213744423 is about 1066.7002964766.

The spelling of 1213744423 in words is "one billion, two hundred thirteen million, seven hundred forty-four thousand, four hundred twenty-three".