172573399 has 2 divisors, whose sum is σ = 172573400. Its totient is φ = 172573398.

The previous prime is 172573369. The next prime is 172573411. The reversal of 172573399 is 993375271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172573399 - 2¹³ = 172565207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172573339) 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, 86286699 + 86286700.

It is an arithmetic number, because the mean of its divisors is an integer number (86286700).

Almost surely, 2^172573399 is an apocalyptic number.

172573399 is a deficient number, since it is larger than the sum of its proper divisors (1).

172573399 is an equidigital number, since it uses as much as digits as its factorization.

172573399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 46.

The square root of 172573399 is about 13136.7194915626. The cubic root of 172573399 is about 556.7470839316.

The spelling of 172573399 in words is "one hundred seventy-two million, five hundred seventy-three thousand, three hundred ninety-nine".