172152137 has 2 divisors, whose sum is σ = 172152138. Its totient is φ = 172152136.

The previous prime is 172152133. The next prime is 172152143. The reversal of 172152137 is 731251271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148376761 + 23775376 = 12181^2 + 4876^2 .

It is a cyclic number.

It is not a de Polignac number, because 172152137 - 2² = 172152133 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172152133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86076068 + 86076069.

It is an arithmetic number, because the mean of its divisors is an integer number (86076069).

Almost surely, 2^172152137 is an apocalyptic number.

It is an amenable number.

172152137 is a deficient number, since it is larger than the sum of its proper divisors (1).

172152137 is an equidigital number, since it uses as much as digits as its factorization.

172152137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 29.

The square root of 172152137 is about 13120.6759353320. The cubic root of 172152137 is about 556.2936971606.

The spelling of 172152137 in words is "one hundred seventy-two million, one hundred fifty-two thousand, one hundred thirty-seven".