11509710397 has 4 divisors (see below), whose sum is σ = 11698394236. Its totient is φ = 11321026560.

The previous prime is 11509710371. The next prime is 11509710403. The reversal of 11509710397 is 79301790511.

11509710397 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2752681156 + 8757029241 = 52466^2 + 93579^2 .

It is a cyclic number.

It is not a de Polignac number, because 11509710397 - 2²³ = 11501321789 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 (11509710337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94341828 + ... + 94341949.

It is an arithmetic number, because the mean of its divisors is an integer number (2924598559).

Almost surely, 2^11509710397 is an apocalyptic number.

It is an amenable number.

11509710397 is a deficient number, since it is larger than the sum of its proper divisors (188683839).

11509710397 is an equidigital number, since it uses as much as digits as its factorization.

11509710397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188683838.

The product of its (nonzero) digits is 59535, while the sum is 43.

The spelling of 11509710397 in words is "eleven billion, five hundred nine million, seven hundred ten thousand, three hundred ninety-seven".