172811113 has 2 divisors, whose sum is σ = 172811114. Its totient is φ = 172811112.

The previous prime is 172811083. The next prime is 172811117. The reversal of 172811113 is 311118271.

172811113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146216464 + 26594649 = 12092^2 + 5157^2 .

It is an emirp because it is prime and its reverse (311118271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172811113 - 2¹⁷ = 172680041 is a prime.

It is not a weakly prime, because it can be changed into another prime (172811117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86405556 + 86405557.

It is an arithmetic number, because the mean of its divisors is an integer number (86405557).

Almost surely, 2^172811113 is an apocalyptic number.

It is an amenable number.

172811113 is a deficient number, since it is larger than the sum of its proper divisors (1).

172811113 is an equidigital number, since it uses as much as digits as its factorization.

172811113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 25.

The square root of 172811113 is about 13145.7640706046. The cubic root of 172811113 is about 557.0026000500.

Adding to 172811113 its reverse (311118271), we get a palindrome (483929384).

The spelling of 172811113 in words is "one hundred seventy-two million, eight hundred eleven thousand, one hundred thirteen".