11197237489 has 3 divisors (see below), whose sum is σ = 11197343307. Its totient is φ = 11197131672.

The previous prime is 11197237487. The next prime is 11197237501. The reversal of 11197237489 is 98473279111.

It is a happy number.

The square root of 11197237489 is 105817.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10844098225 + 353139264 = 104135^2 + 18792^2 .

It is not a de Polignac number, because 11197237489 - 2¹ = 11197237487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11197237487) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52909 + ... + 158725.

It is an arithmetic number, because the mean of its divisors is an integer number (3732447769).

Almost surely, 2^11197237489 is an apocalyptic number.

11197237489 is the 105817-th square number.

11197237489 is the 52909-th centered octagonal number.

It is an amenable number.

11197237489 is a deficient number, since it is larger than the sum of its proper divisors (105818).

11197237489 is an frugal number, since it uses more digits than its factorization.

11197237489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211634 (or 105817 counting only the distinct ones).

The product of its digits is 762048, while the sum is 52.

The spelling of 11197237489 in words is "eleven billion, one hundred ninety-seven million, two hundred thirty-seven thousand, four hundred eighty-nine".