1223469729 has 6 divisors (see below), whose sum is σ = 1767234066. Its totient is φ = 815646480.

The previous prime is 1223469703. The next prime is 1223469743. The reversal of 1223469729 is 9279643221.

It can be written as a sum of positive squares in only one way, i.e., 738589329 + 484880400 = 27177^2 + 22020^2 .

It is not a de Polignac number, because 1223469729 - 2⁵ = 1223469697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223469769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67970532 + ... + 67970549.

It is an arithmetic number, because the mean of its divisors is an integer number (294539011).

Almost surely, 2^1223469729 is an apocalyptic number.

It is an amenable number.

1223469729 is a deficient number, since it is larger than the sum of its proper divisors (543764337).

1223469729 is a wasteful number, since it uses less digits than its factorization.

1223469729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135941087 (or 135941084 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1223469729 is about 34978.1321542475. The cubic root of 1223469729 is about 1069.5417518339.

The spelling of 1223469729 in words is "one billion, two hundred twenty-three million, four hundred sixty-nine thousand, seven hundred twenty-nine".