172105250137 has 2 divisors, whose sum is σ = 172105250138. Its totient is φ = 172105250136.

The previous prime is 172105250101. The next prime is 172105250179. The reversal of 172105250137 is 731052501271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167953252041 + 4151998096 = 409821^2 + 64436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172105250137 is a prime.

It is not a weakly prime, because it can be changed into another prime (172105650137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86052625068 + 86052625069.

It is an arithmetic number, because the mean of its divisors is an integer number (86052625069).

Almost surely, 2^172105250137 is an apocalyptic number.

It is an amenable number.

172105250137 is a deficient number, since it is larger than the sum of its proper divisors (1).

172105250137 is an equidigital number, since it uses as much as digits as its factorization.

172105250137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 172105250137 in words is "one hundred seventy-two billion, one hundred five million, two hundred fifty thousand, one hundred thirty-seven".