11937323917 has 4 divisors (see below), whose sum is σ = 11937546940. Its totient is φ = 11937100896.

The previous prime is 11937323903. The next prime is 11937323927. The reversal of 11937323917 is 71932373911.

11937323917 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 1526386761 + 10410937156 = 39069^2 + 102034^2 .

It is a 3-Lehmer number, since φ(11937323917) divides (11937323917-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11937323917 is a prime.

It is a deceptive number, since it divides R_11937323916.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11937323927) 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, 22303 + ... + 156115.

It is an arithmetic number, because the mean of its divisors is an integer number (2984386735).

Almost surely, 2^11937323917 is an apocalyptic number.

11937323917 is the 89209-th pentagonal number.

It is an amenable number.

11937323917 is a deficient number, since it is larger than the sum of its proper divisors (223023).

11937323917 is an equidigital number, since it uses as much as digits as its factorization.

11937323917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223022.

The product of its digits is 214326, while the sum is 46.

The spelling of 11937323917 in words is "eleven billion, nine hundred thirty-seven million, three hundred twenty-three thousand, nine hundred seventeen".