11131597 has 2 divisors, whose sum is σ = 11131598. Its totient is φ = 11131596.

The previous prime is 11131579. The next prime is 11131613. The reversal of 11131597 is 79513111.

Together with previous prime (11131579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8590761 + 2540836 = 2931^2 + 1594^2 .

It is a cyclic number.

It is not a de Polignac number, because 11131597 - 2⁷ = 11131469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11131507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565798 + 5565799.

It is an arithmetic number, because the mean of its divisors is an integer number (5565799).

Almost surely, 2^11131597 is an apocalyptic number.

It is an amenable number.

11131597 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131597 is an equidigital number, since it uses as much as digits as its factorization.

11131597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945, while the sum is 28.

The square root of 11131597 is about 3336.4048015791. The cubic root of 11131597 is about 223.2813717880.

The spelling of 11131597 in words is "eleven million, one hundred thirty-one thousand, five hundred ninety-seven".