11989898 has 4 divisors (see below), whose sum is σ = 17984850. Its totient is φ = 5994948.

The previous prime is 11989897. The next prime is 11989919. The reversal of 11989898 is 89898911.

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., 7856809 + 4133089 = 2803^2 + 2033^2 .

It is not an unprimeable number, because it can be changed into a prime (11989897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2997473 + ... + 2997476.

Almost surely, 2^11989898 is an apocalyptic number.

11989898 is a deficient number, since it is larger than the sum of its proper divisors (5994952).

11989898 is an equidigital number, since it uses as much as digits as its factorization.

11989898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994951.

The product of its digits is 373248, while the sum is 53.

The square root of 11989898 is about 3462.6432100348. The cubic root of 11989898 is about 228.8785865676.

The spelling of 11989898 in words is "eleven million, nine hundred eighty-nine thousand, eight hundred ninety-eight".