29129439 has 4 divisors (see below), whose sum is σ = 38839256. Its totient is φ = 19419624.

The previous prime is 29129437. The next prime is 29129453. The reversal of 29129439 is 93492192.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 29129439 - 2¹ = 29129437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29129397 and 29129406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29129437) 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, 4854904 + ... + 4854909.

It is an arithmetic number, because the mean of its divisors is an integer number (9709814).

Almost surely, 2^29129439 is an apocalyptic number.

29129439 is a deficient number, since it is larger than the sum of its proper divisors (9709817).

29129439 is an equidigital number, since it uses as much as digits as its factorization.

29129439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709816.

The product of its digits is 34992, while the sum is 39.

The square root of 29129439 is about 5397.1695359698. The cubic root of 29129439 is about 307.6881048833.

The spelling of 29129439 in words is "twenty-nine million, one hundred twenty-nine thousand, four hundred thirty-nine".