172044101 has 2 divisors, whose sum is σ = 172044102. Its totient is φ = 172044100.

The previous prime is 172044073. The next prime is 172044109. The reversal of 172044101 is 101440271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87422500 + 84621601 = 9350^2 + 9199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172044101 is a prime.

It is a super-4 number, since 4×172044101⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172044109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86022050 + 86022051.

It is an arithmetic number, because the mean of its divisors is an integer number (86022051).

Almost surely, 2^172044101 is an apocalyptic number.

It is an amenable number.

172044101 is a deficient number, since it is larger than the sum of its proper divisors (1).

172044101 is an equidigital number, since it uses as much as digits as its factorization.

172044101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 172044101 is about 13116.5582757063. The cubic root of 172044101 is about 556.1773033642.

Adding to 172044101 its reverse (101440271), we get a palindrome (273484372).

The spelling of 172044101 in words is "one hundred seventy-two million, forty-four thousand, one hundred one".