172949329 has 4 divisors (see below), whose sum is σ = 197656384. Its totient is φ = 148242276.

The previous prime is 172949323. The next prime is 172949333. The reversal of 172949329 is 923949271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 172949329 - 2³ = 172949321 is a prime.

It is a super-2 number, since 2×172949329² = 59822940803100482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172949321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12353517 + ... + 12353530.

It is an arithmetic number, because the mean of its divisors is an integer number (49414096).

Almost surely, 2^172949329 is an apocalyptic number.

It is an amenable number.

172949329 is a deficient number, since it is larger than the sum of its proper divisors (24707055).

172949329 is an equidigital number, since it uses as much as digits as its factorization.

172949329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24707054.

The product of its digits is 244944, while the sum is 46.

The square root of 172949329 is about 13151.0200745037. The cubic root of 172949329 is about 557.1510591667.

The spelling of 172949329 in words is "one hundred seventy-two million, nine hundred forty-nine thousand, three hundred twenty-nine".