172115137 has 2 divisors, whose sum is σ = 172115138. Its totient is φ = 172115136.

The previous prime is 172115117. The next prime is 172115143. The reversal of 172115137 is 731511271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170276401 + 1838736 = 13049^2 + 1356^2 .

It is a cyclic number.

It is not a de Polignac number, because 172115137 - 2¹⁹ = 171590849 is a prime.

It is not a weakly prime, because it can be changed into another prime (172115107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86057568 + 86057569.

It is an arithmetic number, because the mean of its divisors is an integer number (86057569).

Almost surely, 2^172115137 is an apocalyptic number.

It is an amenable number.

172115137 is a deficient number, since it is larger than the sum of its proper divisors (1).

172115137 is an equidigital number, since it uses as much as digits as its factorization.

172115137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1470, while the sum is 28.

The square root of 172115137 is about 13119.2658712292. The cubic root of 172115137 is about 556.2538402798.

The spelling of 172115137 in words is "one hundred seventy-two million, one hundred fifteen thousand, one hundred thirty-seven".