29231139 has 32 divisors (see below), whose sum is σ = 47695360. Its totient is φ = 15552000.

The previous prime is 29231129. The next prime is 29231141. The reversal of 29231139 is 93113292.

It is a happy number.

It is not a de Polignac number, because 29231139 - 2⁵ = 29231107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29231119) 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 31 ways as a sum of consecutive naturals, for example, 23739 + ... + 24939.

It is an arithmetic number, because the mean of its divisors is an integer number (1490480).

Almost surely, 2^29231139 is an apocalyptic number.

29231139 is a deficient number, since it is larger than the sum of its proper divisors (18464221).

29231139 is a wasteful number, since it uses less digits than its factorization.

29231139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

The product of its digits is 2916, while the sum is 30.

The square root of 29231139 is about 5406.5829319451. The cubic root of 29231139 is about 308.0457675003.

The spelling of 29231139 in words is "twenty-nine million, two hundred thirty-one thousand, one hundred thirty-nine".