29313021 has 4 divisors (see below), whose sum is σ = 39084032. Its totient is φ = 19542012.

The previous prime is 29313013. The next prime is 29313041. The reversal of 29313021 is 12031392.

It is a happy number.

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.

It is not a de Polignac number, because 29313021 - 2³ = 29313013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29313041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4885501 + ... + 4885506.

It is an arithmetic number, because the mean of its divisors is an integer number (9771008).

Almost surely, 2^29313021 is an apocalyptic number.

It is an amenable number.

29313021 is a deficient number, since it is larger than the sum of its proper divisors (9771011).

29313021 is an equidigital number, since it uses as much as digits as its factorization.

29313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9771010.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 29313021 is about 5414.1500718026. The cubic root of 29313021 is about 308.3331310120. Note that the first 3 decimals are identical.

The spelling of 29313021 in words is "twenty-nine million, three hundred thirteen thousand, twenty-one".