172931029 has 2 divisors, whose sum is σ = 172931030. Its totient is φ = 172931028.

The previous prime is 172930999. The next prime is 172931041. The reversal of 172931029 is 920139271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90212004 + 82719025 = 9498^2 + 9095^2 .

It is a cyclic number.

It is not a de Polignac number, because 172931029 - 2¹³ = 172922837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172930985 and 172931003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172931069) 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 as a sum of consecutive naturals, namely, 86465514 + 86465515.

It is an arithmetic number, because the mean of its divisors is an integer number (86465515).

Almost surely, 2^172931029 is an apocalyptic number.

It is an amenable number.

172931029 is a deficient number, since it is larger than the sum of its proper divisors (1).

172931029 is an equidigital number, since it uses as much as digits as its factorization.

172931029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 172931029 is about 13150.3242925793. The cubic root of 172931029 is about 557.1314075071.

The spelling of 172931029 in words is "one hundred seventy-two million, nine hundred thirty-one thousand, twenty-nine".