29830121 has 4 divisors (see below), whose sum is σ = 31584852. Its totient is φ = 28075392.

The previous prime is 29830111. The next prime is 29830123. The reversal of 29830121 is 12103892.

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 17305600 + 12524521 = 4160^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 29830121 - 2¹⁴ = 29813737 is a prime.

It is a super-2 number, since 2×29830121² = 1779672237749282, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29830123) 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, 877340 + ... + 877373.

It is an arithmetic number, because the mean of its divisors is an integer number (7896213).

Almost surely, 2^29830121 is an apocalyptic number.

It is an amenable number.

29830121 is a deficient number, since it is larger than the sum of its proper divisors (1754731).

29830121 is a wasteful number, since it uses less digits than its factorization.

29830121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754730.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 29830121 is about 5461.6957989255. The cubic root of 29830121 is about 310.1356361018.

The spelling of 29830121 in words is "twenty-nine million, eight hundred thirty thousand, one hundred twenty-one".