172570993 has 6 divisors (see below), whose sum is σ = 200745906. Its totient is φ = 147917952.

The previous prime is 172570973. The next prime is 172571057. The reversal of 172570993 is 399075271.

It can be written as a sum of positive squares in only one way, i.e., 106750224 + 65820769 = 10332^2 + 8113^2 .

It is a de Polignac number, because none of the positive numbers 2^k-172570993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172570943) 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 in 5 ways as a sum of consecutive naturals, for example, 1760880 + ... + 1760977.

It is an arithmetic number, because the mean of its divisors is an integer number (33457651).

Almost surely, 2^172570993 is an apocalyptic number.

It is an amenable number.

172570993 is a deficient number, since it is larger than the sum of its proper divisors (28174913).

172570993 is an equidigital number, since it uses as much as digits as its factorization.

172570993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521871 (or 3521864 counting only the distinct ones).

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 172570993 is about 13136.6279158694. The cubic root of 172570993 is about 556.7444965500.

The spelling of 172570993 in words is "one hundred seventy-two million, five hundred seventy thousand, nine hundred ninety-three".