172163137 has 2 divisors, whose sum is σ = 172163138. Its totient is φ = 172163136.

The previous prime is 172163087. The next prime is 172163149. The reversal of 172163137 is 731361271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104939536 + 67223601 = 10244^2 + 8199^2 .

It is a cyclic number.

It is not a de Polignac number, because 172163137 - 2²³ = 163774529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172163099 and 172163108.

It is not a weakly prime, because it can be changed into another prime (172163197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86081568 + 86081569.

It is an arithmetic number, because the mean of its divisors is an integer number (86081569).

Almost surely, 2^172163137 is an apocalyptic number.

It is an amenable number.

172163137 is a deficient number, since it is larger than the sum of its proper divisors (1).

172163137 is an equidigital number, since it uses as much as digits as its factorization.

172163137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 31.

The square root of 172163137 is about 13121.0951143569. The cubic root of 172163137 is about 556.3055454022.

The spelling of 172163137 in words is "one hundred seventy-two million, one hundred sixty-three thousand, one hundred thirty-seven".