29316421 has 8 divisors (see below), whose sum is σ = 31578624. Its totient is φ = 27136560.

The previous prime is 29316401. The next prime is 29316433. The reversal of 29316421 is 12461392.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29316421 - 2¹³ = 29308229 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 29316421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29316401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19846 + ... + 21271.

It is an arithmetic number, because the mean of its divisors is an integer number (3947328).

Almost surely, 2^29316421 is an apocalyptic number.

It is an amenable number.

29316421 is a deficient number, since it is larger than the sum of its proper divisors (2262203).

29316421 is a wasteful number, since it uses less digits than its factorization.

29316421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41171.

The product of its digits is 2592, while the sum is 28.

The square root of 29316421 is about 5414.4640547334. The cubic root of 29316421 is about 308.3450516770.

The spelling of 29316421 in words is "twenty-nine million, three hundred sixteen thousand, four hundred twenty-one".