1226473189 has 4 divisors (see below), whose sum is σ = 1234595680. Its totient is φ = 1218350700.

The previous prime is 1226473153. The next prime is 1226473201. The reversal of 1226473189 is 9813746221.

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 1226473189 - 2¹⁹ = 1225948901 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 (1226473889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4061019 + ... + 4061320.

It is an arithmetic number, because the mean of its divisors is an integer number (308648920).

Almost surely, 2^1226473189 is an apocalyptic number.

It is an amenable number.

1226473189 is a deficient number, since it is larger than the sum of its proper divisors (8122491).

1226473189 is an equidigital number, since it uses as much as digits as its factorization.

1226473189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8122490.

The product of its digits is 145152, while the sum is 43.

The square root of 1226473189 is about 35021.0392335807. The cubic root of 1226473189 is about 1070.4162322176.

The spelling of 1226473189 in words is "one billion, two hundred twenty-six million, four hundred seventy-three thousand, one hundred eighty-nine".