29166421 has 4 divisors (see below), whose sum is σ = 29177344. Its totient is φ = 29155500.

The previous prime is 29166413. The next prime is 29166433. The reversal of 29166421 is 12466192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 29166421 - 2³ = 29166413 is a prime.

It is a super-2 number, since 2×29166421² = 1701360227898482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29166491) 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, 1516 + ... + 7786.

It is an arithmetic number, because the mean of its divisors is an integer number (7294336).

Almost surely, 2^29166421 is an apocalyptic number.

It is an amenable number.

29166421 is a deficient number, since it is larger than the sum of its proper divisors (10923).

29166421 is an equidigital number, since it uses as much as digits as its factorization.

29166421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10922.

The product of its digits is 5184, while the sum is 31.

The square root of 29166421 is about 5400.5945043115. The cubic root of 29166421 is about 307.8182608334.

The spelling of 29166421 in words is "twenty-nine million, one hundred sixty-six thousand, four hundred twenty-one".