169988941 has 2 divisors, whose sum is σ = 169988942. Its totient is φ = 169988940.

The previous prime is 169988939. The next prime is 169988947. The reversal of 169988941 is 149889961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162945225 + 7043716 = 12765^2 + 2654^2 .

It is a cyclic number.

It is not a de Polignac number, because 169988941 - 2¹ = 169988939 is a prime.

It is a super-3 number, since 3×169988941³ (a number of 26 digits) contains 333 as substring.

Together with 169988939, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169988947) 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, 84994470 + 84994471.

It is an arithmetic number, because the mean of its divisors is an integer number (84994471).

Almost surely, 2^169988941 is an apocalyptic number.

It is an amenable number.

169988941 is a deficient number, since it is larger than the sum of its proper divisors (1).

169988941 is an equidigital number, since it uses as much as digits as its factorization.

169988941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 55.

The square root of 169988941 is about 13037.9807102174. The cubic root of 169988941 is about 553.9538130462.

The spelling of 169988941 in words is "one hundred sixty-nine million, nine hundred eighty-eight thousand, nine hundred forty-one".