29172429 has 48 divisors (see below), whose sum is σ = 52153920. Its totient is φ = 15448320.

The previous prime is 29172427. The next prime is 29172431. The reversal of 29172429 is 92427192.

It is an interprime number because it is at equal distance from previous prime (29172427) and next prime (29172431).

It is not a de Polignac number, because 29172429 - 2¹ = 29172427 is a prime.

It is a super-2 number, since 2×29172429² = 1702061227520082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 29172393 and 29172402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29172421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23857 + ... + 25049.

It is an arithmetic number, because the mean of its divisors is an integer number (1086540).

Almost surely, 2^29172429 is an apocalyptic number.

It is an amenable number.

29172429 is a deficient number, since it is larger than the sum of its proper divisors (22981491).

29172429 is a wasteful number, since it uses less digits than its factorization.

29172429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1239 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 29172429 is about 5401.1507107282. The cubic root of 29172429 is about 307.8393952416.

The spelling of 29172429 in words is "twenty-nine million, one hundred seventy-two thousand, four hundred twenty-nine".