172805093 has 2 divisors, whose sum is σ = 172805094. Its totient is φ = 172805092.

The previous prime is 172805071. The next prime is 172805099. The reversal of 172805093 is 390508271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156175009 + 16630084 = 12497^2 + 4078^2 .

It is a cyclic number.

It is not a de Polignac number, because 172805093 - 2¹² = 172800997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172805099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86402546 + 86402547.

It is an arithmetic number, because the mean of its divisors is an integer number (86402547).

Almost surely, 2^172805093 is an apocalyptic number.

It is an amenable number.

172805093 is a deficient number, since it is larger than the sum of its proper divisors (1).

172805093 is an equidigital number, since it uses as much as digits as its factorization.

172805093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 172805093 is about 13145.5350975150. The cubic root of 172805093 is about 556.9961321122.

The spelling of 172805093 in words is "one hundred seventy-two million, eight hundred five thousand, ninety-three".