29709121 has 4 divisors (see below), whose sum is σ = 31994452. Its totient is φ = 27423792.

The previous prime is 29709109. The next prime is 29709143. The reversal of 29709121 is 12190792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13395600 + 16313521 = 3660^2 + 4039^2 .

It is a cyclic number.

It is not a de Polignac number, because 29709121 - 2⁵ = 29709089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29709101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142646 + ... + 1142671.

It is an arithmetic number, because the mean of its divisors is an integer number (7998613).

Almost surely, 2^29709121 is an apocalyptic number.

It is an amenable number.

29709121 is a deficient number, since it is larger than the sum of its proper divisors (2285331).

29709121 is a wasteful number, since it uses less digits than its factorization.

29709121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285330.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 29709121 is about 5450.6073973457. The cubic root of 29709121 is about 309.7157331664.

The spelling of 29709121 in words is "twenty-nine million, seven hundred nine thousand, one hundred twenty-one".