172004073 has 4 divisors (see below), whose sum is σ = 229338768. Its totient is φ = 114669380.

The previous prime is 172004059. The next prime is 172004087. The reversal of 172004073 is 370400271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 370400271 = 3 ⋅123466757.

It is an interprime number because it is at equal distance from previous prime (172004059) and next prime (172004087).

It is a cyclic number.

It is not a de Polignac number, because 172004073 - 2⁸ = 172003817 is a prime.

It is a super-2 number, since 2×172004073² = 59170802257178658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172004003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28667343 + ... + 28667348.

It is an arithmetic number, because the mean of its divisors is an integer number (57334692).

Almost surely, 2^172004073 is an apocalyptic number.

It is an amenable number.

172004073 is a deficient number, since it is larger than the sum of its proper divisors (57334695).

172004073 is an equidigital number, since it uses as much as digits as its factorization.

172004073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57334694.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 172004073 is about 13115.0323293540. The cubic root of 172004073 is about 556.1341663783.

The spelling of 172004073 in words is "one hundred seventy-two million, four thousand, seventy-three".