1223955493 has 4 divisors (see below), whose sum is σ = 1253808108. Its totient is φ = 1194102880.

The previous prime is 1223955437. The next prime is 1223955497. The reversal of 1223955493 is 3945593221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 489382884 + 734572609 = 22122^2 + 27103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223955493 - 2¹⁷ = 1223824421 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 (1223955497) 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, 14926246 + ... + 14926327.

It is an arithmetic number, because the mean of its divisors is an integer number (313452027).

Almost surely, 2^1223955493 is an apocalyptic number.

It is an amenable number.

1223955493 is a deficient number, since it is larger than the sum of its proper divisors (29852615).

1223955493 is an equidigital number, since it uses as much as digits as its factorization.

1223955493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29852614.

The product of its digits is 291600, while the sum is 43.

The square root of 1223955493 is about 34985.0752893287. The cubic root of 1223955493 is about 1069.6832826847.

The spelling of 1223955493 in words is "one billion, two hundred twenty-three million, nine hundred fifty-five thousand, four hundred ninety-three".