169944641 has 2 divisors, whose sum is σ = 169944642. Its totient is φ = 169944640.

The previous prime is 169944637. The next prime is 169944653. The reversal of 169944641 is 146449961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94167616 + 75777025 = 9704^2 + 8705^2 .

It is a cyclic number.

It is not a de Polignac number, because 169944641 - 2² = 169944637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 169944592 and 169944601.

It is not a weakly prime, because it can be changed into another prime (169944601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84972320 + 84972321.

It is an arithmetic number, because the mean of its divisors is an integer number (84972321).

Almost surely, 2^169944641 is an apocalyptic number.

It is an amenable number.

169944641 is a deficient number, since it is larger than the sum of its proper divisors (1).

169944641 is an equidigital number, since it uses as much as digits as its factorization.

169944641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 169944641 is about 13036.2817168087. The cubic root of 169944641 is about 553.9056877861.

The spelling of 169944641 in words is "one hundred sixty-nine million, nine hundred forty-four thousand, six hundred forty-one".