169356973 has 2 divisors, whose sum is σ = 169356974. Its totient is φ = 169356972.

The previous prime is 169356949. The next prime is 169356977. The reversal of 169356973 is 379653961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167909764 + 1447209 = 12958^2 + 1203^2 .

It is an emirp because it is prime and its reverse (379653961) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169356973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169356977) 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, 84678486 + 84678487.

It is an arithmetic number, because the mean of its divisors is an integer number (84678487).

Almost surely, 2^169356973 is an apocalyptic number.

It is an amenable number.

169356973 is a deficient number, since it is larger than the sum of its proper divisors (1).

169356973 is an equidigital number, since it uses as much as digits as its factorization.

169356973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 49.

The square root of 169356973 is about 13013.7224882045. The cubic root of 169356973 is about 553.2664824239.

The spelling of 169356973 in words is "one hundred sixty-nine million, three hundred fifty-six thousand, nine hundred seventy-three".