11931097 has 4 divisors (see below), whose sum is σ = 12054196. Its totient is φ = 11808000.

The previous prime is 11931079. The next prime is 11931113. The reversal of 11931097 is 79013911.

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 3956121 + 7974976 = 1989^2 + 2824^2 .

It is a cyclic number.

It is not a de Polignac number, because 11931097 - 2⁷ = 11930969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11931397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61404 + ... + 61597.

It is an arithmetic number, because the mean of its divisors is an integer number (3013549).

Almost surely, 2^11931097 is an apocalyptic number.

It is an amenable number.

11931097 is a deficient number, since it is larger than the sum of its proper divisors (123099).

11931097 is an equidigital number, since it uses as much as digits as its factorization.

11931097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123098.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 11931097 is about 3454.1420063454. The cubic root of 11931097 is about 228.5038168885.

The spelling of 11931097 in words is "eleven million, nine hundred thirty-one thousand, ninety-seven".