169273121 has 2 divisors, whose sum is σ = 169273122. Its totient is φ = 169273120.

The previous prime is 169273079. The next prime is 169273127. The reversal of 169273121 is 121372961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128504896 + 40768225 = 11336^2 + 6385^2 .

It is a cyclic number.

It is not a de Polignac number, because 169273121 - 2¹⁰ = 169272097 is a prime.

It is not a weakly prime, because it can be changed into another prime (169273127) 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, 84636560 + 84636561.

It is an arithmetic number, because the mean of its divisors is an integer number (84636561).

Almost surely, 2^169273121 is an apocalyptic number.

It is an amenable number.

169273121 is a deficient number, since it is larger than the sum of its proper divisors (1).

169273121 is an equidigital number, since it uses as much as digits as its factorization.

169273121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 169273121 is about 13010.5004131279. The cubic root of 169273121 is about 553.1751562762.

The spelling of 169273121 in words is "one hundred sixty-nine million, two hundred seventy-three thousand, one hundred twenty-one".