11208726997 has 4 divisors (see below), whose sum is σ = 12070936780. Its totient is φ = 10346517216.

The previous prime is 11208726961. The next prime is 11208727007. The reversal of 11208726997 is 79962780211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5855463441 + 5353263556 = 76521^2 + 73166^2 .

It is a cyclic number.

It is not a de Polignac number, because 11208726997 - 2⁷ = 11208726869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11208726197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431104872 + ... + 431104897.

It is an arithmetic number, because the mean of its divisors is an integer number (3017734195).

Almost surely, 2^11208726997 is an apocalyptic number.

It is an amenable number.

11208726997 is a deficient number, since it is larger than the sum of its proper divisors (862209783).

11208726997 is an equidigital number, since it uses as much as digits as its factorization.

11208726997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862209782.

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

The spelling of 11208726997 in words is "eleven billion, two hundred eight million, seven hundred twenty-six thousand, nine hundred ninety-seven".