169145539 has 2 divisors, whose sum is σ = 169145540. Its totient is φ = 169145538.

The previous prime is 169145533. The next prime is 169145549. The reversal of 169145539 is 935541961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 169145539 - 2¹³ = 169137347 is a prime.

It is a super-2 number, since 2×169145539² = 57220426727201042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 169145495 and 169145504.

It is not a weakly prime, because it can be changed into another prime (169145533) 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, 84572769 + 84572770.

It is an arithmetic number, because the mean of its divisors is an integer number (84572770).

Almost surely, 2^169145539 is an apocalyptic number.

169145539 is a deficient number, since it is larger than the sum of its proper divisors (1).

169145539 is an equidigital number, since it uses as much as digits as its factorization.

169145539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 43.

The square root of 169145539 is about 13005.5964492214. The cubic root of 169145539 is about 553.0361443827.

The spelling of 169145539 in words is "one hundred sixty-nine million, one hundred forty-five thousand, five hundred thirty-nine".