29826326209 has 9 divisors (see below), whose sum is σ = 31687140387. Its totient is φ = 28069073184.

The previous prime is 29826326177. The next prime is 29826326221. The reversal of 29826326209 is 90262362892.

The square root of 29826326209 is 172703.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 23221188225 + 6605137984 = 152385^2 + 81272^2 .

It is not a de Polignac number, because 29826326209 - 2⁵ = 29826326177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29826326279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2930872 + ... + 2941030.

Almost surely, 2^29826326209 is an apocalyptic number.

29826326209 is the 172703-rd square number.

29826326209 is the 86352-nd centered octagonal number.

It is an amenable number.

29826326209 is a deficient number, since it is larger than the sum of its proper divisors (1860814178).

29826326209 is an frugal number, since it uses more digits than its factorization.

29826326209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20352 (or 10176 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

Multiplying 29826326209 by its sum of digits (49), we get a square (1461489984241 = 1208921²).

The spelling of 29826326209 in words is "twenty-nine billion, eight hundred twenty-six million, three hundred twenty-six thousand, two hundred nine".