172011001 has 2 divisors, whose sum is σ = 172011002. Its totient is φ = 172011000.

The previous prime is 172010989. The next prime is 172011011. The reversal of 172011001 is 100110271.

172011001 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., 134003776 + 38007225 = 11576^2 + 6165^2 .

It is a cyclic number.

It is not a de Polignac number, because 172011001 - 2⁷ = 172010873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172011011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86005500 + 86005501.

It is an arithmetic number, because the mean of its divisors is an integer number (86005501).

Almost surely, 2^172011001 is an apocalyptic number.

It is an amenable number.

172011001 is a deficient number, since it is larger than the sum of its proper divisors (1).

172011001 is an equidigital number, since it uses as much as digits as its factorization.

172011001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14, while the sum is 13.

The square root of 172011001 is about 13115.2964510910. The cubic root of 172011001 is about 556.1416329569.

Adding to 172011001 its reverse (100110271), we get a palindrome (272121272).

It can be divided in two parts, 1720 and 11001, that added together give a palindrome (12721).

The spelling of 172011001 in words is "one hundred seventy-two million, eleven thousand, one".