1223893261 has 4 divisors (see below), whose sum is σ = 1227880192. Its totient is φ = 1219906332.

The previous prime is 1223893259. The next prime is 1223893271. The reversal of 1223893261 is 1623983221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1223893261 - 2¹ = 1223893259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223893261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223893211) 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 3 ways as a sum of consecutive naturals, for example, 1993005 + ... + 1993618.

It is an arithmetic number, because the mean of its divisors is an integer number (306970048).

Almost surely, 2^1223893261 is an apocalyptic number.

It is an amenable number.

1223893261 is a deficient number, since it is larger than the sum of its proper divisors (3986931).

1223893261 is an equidigital number, since it uses as much as digits as its factorization.

1223893261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986930.

The product of its digits is 31104, while the sum is 37.

The square root of 1223893261 is about 34984.1858701900. The cubic root of 1223893261 is about 1069.6651530336.

The spelling of 1223893261 in words is "one billion, two hundred twenty-three million, eight hundred ninety-three thousand, two hundred sixty-one".