172109033 has 4 divisors (see below), whose sum is σ = 172596948. Its totient is φ = 171621120.

The previous prime is 172109029. The next prime is 172109039. The reversal of 172109033 is 330901271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330901271 = 61 ⋅5424611.

It can be written as a sum of positive squares in 2 ways, for example, as 95511529 + 76597504 = 9773^2 + 8752^2 .

It is a cyclic number.

It is not a de Polignac number, because 172109033 - 2² = 172109029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172108993 and 172109011.

It is not an unprimeable number, because it can be changed into a prime (172109039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243428 + ... + 244133.

It is an arithmetic number, because the mean of its divisors is an integer number (43149237).

Almost surely, 2^172109033 is an apocalyptic number.

It is an amenable number.

172109033 is a deficient number, since it is larger than the sum of its proper divisors (487915).

172109033 is an equidigital number, since it uses as much as digits as its factorization.

172109033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487914.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 172109033 is about 13119.0332341983. The cubic root of 172109033 is about 556.2472644229.

The spelling of 172109033 in words is "one hundred seventy-two million, one hundred nine thousand, thirty-three".