29172229 has 2 divisors, whose sum is σ = 29172230. Its totient is φ = 29172228.

The previous prime is 29172217. The next prime is 29172233. The reversal of 29172229 is 92227192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28912129 + 260100 = 5377^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 29172229 - 2⁹ = 29171717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29172194 and 29172203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29172029) 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 as a sum of consecutive naturals, namely, 14586114 + 14586115.

It is an arithmetic number, because the mean of its divisors is an integer number (14586115).

Almost surely, 2^29172229 is an apocalyptic number.

It is an amenable number.

29172229 is a deficient number, since it is larger than the sum of its proper divisors (1).

29172229 is an equidigital number, since it uses as much as digits as its factorization.

29172229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 29172229 is about 5401.1321961233. The cubic root of 29172229 is about 307.8386917460.

The spelling of 29172229 in words is "twenty-nine million, one hundred seventy-two thousand, two hundred twenty-nine".