172055069 has 4 divisors (see below), whose sum is σ = 176705244. Its totient is φ = 167404896.

The previous prime is 172055047. The next prime is 172055071. The reversal of 172055069 is 960550271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90820900 + 81234169 = 9530^2 + 9013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172055069 is a prime.

It is a super-2 number, since 2×172055069² = 59205893537189522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172055029) 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, 2325032 + ... + 2325105.

It is an arithmetic number, because the mean of its divisors is an integer number (44176311).

Almost surely, 2^172055069 is an apocalyptic number.

It is an amenable number.

172055069 is a deficient number, since it is larger than the sum of its proper divisors (4650175).

172055069 is an equidigital number, since it uses as much as digits as its factorization.

172055069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650174.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 172055069 is about 13116.9763665259. The cubic root of 172055069 is about 556.1891220839.

The spelling of 172055069 in words is "one hundred seventy-two million, fifty-five thousand, sixty-nine".