172116349 has 2 divisors, whose sum is σ = 172116350. Its totient is φ = 172116348.

The previous prime is 172116323. The next prime is 172116409. The reversal of 172116349 is 943611271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113103225 + 59013124 = 10635^2 + 7682^2 .

It is a cyclic number.

It is not a de Polignac number, because 172116349 - 2⁵ = 172116317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172116149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86058174 + 86058175.

It is an arithmetic number, because the mean of its divisors is an integer number (86058175).

Almost surely, 2^172116349 is an apocalyptic number.

It is an amenable number.

172116349 is a deficient number, since it is larger than the sum of its proper divisors (1).

172116349 is an equidigital number, since it uses as much as digits as its factorization.

172116349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 172116349 is about 13119.3120627569. The cubic root of 172116349 is about 556.2551459525.

The spelling of 172116349 in words is "one hundred seventy-two million, one hundred sixteen thousand, three hundred forty-nine".