29993121 has 12 divisors (see below), whose sum is σ = 43423380. Its totient is φ = 19949280.

The previous prime is 29993111. The next prime is 29993137. The reversal of 29993121 is 12139992.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22896225 + 7096896 = 4785^2 + 2664^2 .

It is not a de Polignac number, because 29993121 - 2⁶ = 29993057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29993111) 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 11 ways as a sum of consecutive naturals, for example, 535 + ... + 7763.

It is an arithmetic number, because the mean of its divisors is an integer number (3618615).

Almost surely, 2^29993121 is an apocalyptic number.

It is an amenable number.

29993121 is a deficient number, since it is larger than the sum of its proper divisors (13430259).

29993121 is a wasteful number, since it uses less digits than its factorization.

29993121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696 (or 7693 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 29993121 is about 5476.5975751373. The cubic root of 29993121 is about 310.6994991661.

The spelling of 29993121 in words is "twenty-nine million, nine hundred ninety-three thousand, one hundred twenty-one".