172140629 has 2 divisors, whose sum is σ = 172140630. Its totient is φ = 172140628.

The previous prime is 172140571. The next prime is 172140667. The reversal of 172140629 is 926041271.

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., 155575729 + 16564900 = 12473^2 + 4070^2 .

It is an emirp because it is prime and its reverse (926041271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172140629 - 2¹² = 172136533 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 172140595 and 172140604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172140679) 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, 86070314 + 86070315.

It is an arithmetic number, because the mean of its divisors is an integer number (86070315).

Almost surely, 2^172140629 is an apocalyptic number.

It is an amenable number.

172140629 is a deficient number, since it is larger than the sum of its proper divisors (1).

172140629 is an equidigital number, since it uses as much as digits as its factorization.

172140629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 172140629 is about 13120.2373835232. The cubic root of 172140629 is about 556.2813012054.

The spelling of 172140629 in words is "one hundred seventy-two million, one hundred forty thousand, six hundred twenty-nine".