172799993 has 2 divisors, whose sum is σ = 172799994. Its totient is φ = 172799992.

The previous prime is 172799987. The next prime is 172800029. The reversal of 172799993 is 399997271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153685609 + 19114384 = 12397^2 + 4372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172799993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172799923) 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, 86399996 + 86399997.

It is an arithmetic number, because the mean of its divisors is an integer number (86399997).

Almost surely, 2^172799993 is an apocalyptic number.

It is an amenable number.

172799993 is a deficient number, since it is larger than the sum of its proper divisors (1).

172799993 is an equidigital number, since it uses as much as digits as its factorization.

172799993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1928934, while the sum is 56.

The square root of 172799993 is about 13145.3411138700. The cubic root of 172799993 is about 556.9906525124.

It can be divided in two parts, 17279 and 9993, that added together give a palindrome (27272).

The spelling of 172799993 in words is "one hundred seventy-two million, seven hundred ninety-nine thousand, nine hundred ninety-three".