1213023423 has 32 divisors (see below), whose sum is σ = 1754320896. Its totient is φ = 742629888.

The previous prime is 1213023419. The next prime is 1213023437. The reversal of 1213023423 is 3243203121.

It is not a de Polignac number, because 1213023423 - 2² = 1213023419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213023423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213023443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1109265 + ... + 1110357.

It is an arithmetic number, because the mean of its divisors is an integer number (54822528).

Almost surely, 2^1213023423 is an apocalyptic number.

1213023423 is a deficient number, since it is larger than the sum of its proper divisors (541297473).

1213023423 is a wasteful number, since it uses less digits than its factorization.

1213023423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1213023423 is about 34828.4857982658. The cubic root of 1213023423 is about 1066.4890374897.

Adding to 1213023423 its reverse (3243203121), we get a palindrome (4456226544).

It can be divided in two parts, 12130 and 23423, that added together give a palindrome (35553).

The spelling of 1213023423 in words is "one billion, two hundred thirteen million, twenty-three thousand, four hundred twenty-three".