11909698 has 4 divisors (see below), whose sum is σ = 17864550. Its totient is φ = 5954848.

The previous prime is 11909693. The next prime is 11909717. The reversal of 11909698 is 89690911.

11909698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89690911 = 6553 ⋅13687.

It can be written as a sum of positive squares in only one way, i.e., 11881809 + 27889 = 3447^2 + 167^2 .

It is not an unprimeable number, because it can be changed into a prime (11909693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2977423 + ... + 2977426.

Almost surely, 2^11909698 is an apocalyptic number.

11909698 is a deficient number, since it is larger than the sum of its proper divisors (5954852).

11909698 is an equidigital number, since it uses as much as digits as its factorization.

11909698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5954851.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 11909698 is about 3451.0430307372. The cubic root of 11909698 is about 228.3671242488.

The spelling of 11909698 in words is "eleven million, nine hundred nine thousand, six hundred ninety-eight".