172134875897 has 4 divisors (see below), whose sum is σ = 179619000960. Its totient is φ = 164650750836.

The previous prime is 172134875807. The next prime is 172134875921. The reversal of 172134875897 is 798578431271.

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: 798578431271 = 2221 ⋅359558051.

It is a cyclic number.

It is not a de Polignac number, because 172134875897 - 2¹² = 172134871801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172134875807) 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, 3742062497 + ... + 3742062542.

It is an arithmetic number, because the mean of its divisors is an integer number (44904750240).

Almost surely, 2^172134875897 is an apocalyptic number.

It is an amenable number.

172134875897 is a deficient number, since it is larger than the sum of its proper divisors (7484125063).

172134875897 is an equidigital number, since it uses as much as digits as its factorization.

172134875897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7484125062.

The product of its digits is 23708160, while the sum is 62.

The spelling of 172134875897 in words is "one hundred seventy-two billion, one hundred thirty-four million, eight hundred seventy-five thousand, eight hundred ninety-seven".