173242387 has 2 divisors, whose sum is σ = 173242388. Its totient is φ = 173242386.

The previous prime is 173242357. The next prime is 173242409. The reversal of 173242387 is 783242371.

It is a strong prime.

It is an emirp because it is prime and its reverse (783242371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173242387 - 2¹⁹ = 172718099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (173242337) 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, 86621193 + 86621194.

It is an arithmetic number, because the mean of its divisors is an integer number (86621194).

Almost surely, 2^173242387 is an apocalyptic number.

173242387 is a deficient number, since it is larger than the sum of its proper divisors (1).

173242387 is an equidigital number, since it uses as much as digits as its factorization.

173242387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 37.

The square root of 173242387 is about 13162.1573839550. The cubic root of 173242387 is about 557.4655740974.

The spelling of 173242387 in words is "one hundred seventy-three million, two hundred forty-two thousand, three hundred eighty-seven".