172105079 has 2 divisors, whose sum is σ = 172105080. Its totient is φ = 172105078.

The previous prime is 172105061. The next prime is 172105081. The reversal of 172105079 is 970501271.

172105079 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172105079 is a prime.

It is a super-3 number, since 3×172105079³ (a number of 26 digits) contains 333 as substring.

Together with 172105081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172105009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86052539 + 86052540.

It is an arithmetic number, because the mean of its divisors is an integer number (86052540).

Almost surely, 2^172105079 is an apocalyptic number.

172105079 is a deficient number, since it is larger than the sum of its proper divisors (1).

172105079 is an equidigital number, since it uses as much as digits as its factorization.

172105079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 172105079 is about 13118.8825362528. The cubic root of 172105079 is about 556.2430046842.

The spelling of 172105079 in words is "one hundred seventy-two million, one hundred five thousand, seventy-nine".