898989 has 32 divisors (see below), whose sum is σ = 1532160. Its totient is φ = 456192.

The previous prime is 898987. The next prime is 899009. The reversal of 898989 is 989898.

898989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 898989 - 2¹ = 898987 is a prime.

It is an alternating number because its digits alternate between even and odd.

898989 is an undulating number in base 10.

898989 is a modest number, since divided by 8989 gives 89 as remainder.

898989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (898981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10057 + ... + 10145.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁸⁹⁸⁹⁸⁹ is an apocalyptic number.

898989 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

898989 is a deficient number, since it is larger than the sum of its proper divisors (633171).

898989 is a wasteful number, since it uses less digits than its factorization.

898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its digits is 373248, while the sum is 51.

The square root of 898989 is about 948.1503045404. The cubic root of 898989 is about 96.5127727015.

Subtracting 898989 from its reverse (989898), we obtain a palindrome (90909).

The spelling of 898989 in words is "eight hundred ninety-eight thousand, nine hundred eighty-nine".