172084427 has 4 divisors (see below), whose sum is σ = 172357776. Its totient is φ = 171811080.

The previous prime is 172084369. The next prime is 172084439. The reversal of 172084427 is 724480271.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 172084427 - 2²² = 167890123 is a prime.

It is a super-2 number, since 2×172084427² = 59226100031836658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172084027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135728 + ... + 136989.

It is an arithmetic number, because the mean of its divisors is an integer number (43089444).

Almost surely, 2^172084427 is an apocalyptic number.

172084427 is a deficient number, since it is larger than the sum of its proper divisors (273349).

172084427 is an equidigital number, since it uses as much as digits as its factorization.

172084427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273348.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 172084427 is about 13118.0954029158. The cubic root of 172084427 is about 556.2207547306.

The spelling of 172084427 in words is "one hundred seventy-two million, eighty-four thousand, four hundred twenty-seven".