209489898 has 8 divisors (see below), whose sum is σ = 418979808. Its totient is φ = 69829964.

The previous prime is 209489897. The next prime is 209489899. The reversal of 209489898 is 898984902.

It is an interprime number because it is at equal distance from previous prime (209489897) and next prime (209489899).

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

209489898 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (209489897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17457486 + ... + 17457497.

It is an arithmetic number, because the mean of its divisors is an integer number (52372476).

Almost surely, 2^209489898 is an apocalyptic number.

209489898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209489898 is a wasteful number, since it uses less digits than its factorization.

209489898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34914988.

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

The square root of 209489898 is about 14473.7658541238. The cubic root of 209489898 is about 593.9105342023.

The spelling of 209489898 in words is "two hundred nine million, four hundred eighty-nine thousand, eight hundred ninety-eight".