29789724409 has 3 divisors (see below), whose sum is σ = 29789897007. Its totient is φ = 29789551812.

The previous prime is 29789724403. The next prime is 29789724421. The reversal of 29789724409 is 90442798792.

The square root of 29789724409 is 172597.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 215355625 + 29574368784 = 14675^2 + 171972^2 .

It is not a de Polignac number, because 29789724409 - 2⁹ = 29789723897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29789724403) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 86299 + ... + 258895.

It is an arithmetic number, because the mean of its divisors is an integer number (9929965669).

Almost surely, 2^29789724409 is an apocalyptic number.

29789724409 is the 172597-th square number.

29789724409 is the 86299-th centered octagonal number.

It is an amenable number.

29789724409 is a deficient number, since it is larger than the sum of its proper divisors (172598).

29789724409 is an frugal number, since it uses more digits than its factorization.

29789724409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345194 (or 172597 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 29789724409 in words is "twenty-nine billion, seven hundred eighty-nine million, seven hundred twenty-four thousand, four hundred nine".