168826989 has 8 divisors (see below), whose sum is σ = 236950240. Its totient is φ = 106627536.

The previous prime is 168826981. The next prime is 168826993. The reversal of 168826989 is 989628861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168826989 - 2³ = 168826981 is a prime.

It is a super-2 number, since 2×168826989² = 57005104429612242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 2961877 = 168826989 / (1 + 6 + 8 + 8 + 2 + 6 + 9 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168826981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480882 + ... + 1480995.

It is an arithmetic number, because the mean of its divisors is an integer number (29618780).

Almost surely, 2^168826989 is an apocalyptic number.

168826989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

168826989 is a deficient number, since it is larger than the sum of its proper divisors (68123251).

168826989 is a wasteful number, since it uses less digits than its factorization.

168826989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961899.

The product of its digits is 2985984, while the sum is 57.

The square root of 168826989 is about 12993.3440268470. The cubic root of 168826989 is about 552.6887505082.

It can be divided in two parts, 16882 and 6989, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 168826989 in words is "one hundred sixty-eight million, eight hundred twenty-six thousand, nine hundred eighty-nine".