169468981 has 16 divisors (see below), whose sum is σ = 190061568. Its totient is φ = 149785200.

The previous prime is 169468979. The next prime is 169469023. The reversal of 169468981 is 189864961.

It is a cyclic number.

It is not a de Polignac number, because 169468981 - 2¹ = 169468979 is a prime.

It is a super-2 number, since 2×169468981² = 57439471042356722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169468951) 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 in 15 ways as a sum of consecutive naturals, for example, 83266 + ... + 85276.

It is an arithmetic number, because the mean of its divisors is an integer number (11878848).

Almost surely, 2^169468981 is an apocalyptic number.

169468981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

169468981 is a deficient number, since it is larger than the sum of its proper divisors (20592587).

169468981 is a wasteful number, since it uses less digits than its factorization.

169468981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its digits is 746496, while the sum is 52.

The square root of 169468981 is about 13018.0252342665. The cubic root of 169468981 is about 553.3884272412.

The spelling of 169468981 in words is "one hundred sixty-nine million, four hundred sixty-eight thousand, nine hundred eighty-one".