172143029 has 2 divisors, whose sum is σ = 172143030. Its totient is φ = 172143028.

The previous prime is 172143011. The next prime is 172143091. The reversal of 172143029 is 920341271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91107025 + 81036004 = 9545^2 + 9002^2 .

It is a cyclic number.

It is not a de Polignac number, because 172143029 - 2²⁰ = 171094453 is a prime.

It is equal to p_9616250 and since 172143029 and 9616250 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 172142992 and 172143010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172143229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86071514 + 86071515.

It is an arithmetic number, because the mean of its divisors is an integer number (86071515).

Almost surely, 2^172143029 is an apocalyptic number.

It is an amenable number.

172143029 is a deficient number, since it is larger than the sum of its proper divisors (1).

172143029 is an equidigital number, since it uses as much as digits as its factorization.

172143029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 172143029 is about 13120.3288449642. The cubic root of 172143029 is about 556.2838864345.

The spelling of 172143029 in words is "one hundred seventy-two million, one hundred forty-three thousand, twenty-nine".