209424898 has 4 divisors (see below), whose sum is σ = 314137350. Its totient is φ = 104712448.

The previous prime is 209424893. The next prime is 209424907. The reversal of 209424898 is 898424902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 171269569 + 38155329 = 13087^2 + 6177^2 .

It is not an unprimeable number, because it can be changed into a prime (209424893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52356223 + ... + 52356226.

Almost surely, 2^209424898 is an apocalyptic number.

209424898 is a deficient number, since it is larger than the sum of its proper divisors (104712452).

209424898 is a wasteful number, since it uses less digits than its factorization.

209424898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104712451.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 209424898 is about 14471.5202380400. The cubic root of 209424898 is about 593.8491021580.

The spelling of 209424898 in words is "two hundred nine million, four hundred twenty-four thousand, eight hundred ninety-eight".