1226688829 has 4 divisors (see below), whose sum is σ = 1226986684. Its totient is φ = 1226390976.

The previous prime is 1226688791. The next prime is 1226688857. The reversal of 1226688829 is 9288866221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9288866221 = 157 ⋅59164753.

It can be written as a sum of positive squares in 2 ways, for example, as 954933604 + 271755225 = 30902^2 + 16485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226688829 - 2¹¹ = 1226686781 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 (1226688889) 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, 142662 + ... + 151015.

It is an arithmetic number, because the mean of its divisors is an integer number (306746671).

Almost surely, 2^1226688829 is an apocalyptic number.

It is an amenable number.

1226688829 is a deficient number, since it is larger than the sum of its proper divisors (297855).

1226688829 is an equidigital number, since it uses as much as digits as its factorization.

1226688829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297854.

The product of its digits is 1327104, while the sum is 52.

The square root of 1226688829 is about 35024.1178190115. The cubic root of 1226688829 is about 1070.4789625003.

The spelling of 1226688829 in words is "one billion, two hundred twenty-six million, six hundred eighty-eight thousand, eight hundred twenty-nine".