172488923 has 2 divisors, whose sum is σ = 172488924. Its totient is φ = 172488922.

The previous prime is 172488917. The next prime is 172488941. The reversal of 172488923 is 329884271.

It is a weak prime.

It is an emirp because it is prime and its reverse (329884271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172488923 is a prime.

It is not a weakly prime, because it can be changed into another prime (172788923) 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, 86244461 + 86244462.

It is an arithmetic number, because the mean of its divisors is an integer number (86244462).

Almost surely, 2^172488923 is an apocalyptic number.

172488923 is a deficient number, since it is larger than the sum of its proper divisors (1).

172488923 is an equidigital number, since it uses as much as digits as its factorization.

172488923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 172488923 is about 13133.5038356107. The cubic root of 172488923 is about 556.6562251180.

The spelling of 172488923 in words is "one hundred seventy-two million, four hundred eighty-eight thousand, nine hundred twenty-three".