1131913 has 2 divisors, whose sum is σ = 1131914. Its totient is φ = 1131912.

The previous prime is 1131883. The next prime is 1131917. The reversal of 1131913 is 3191311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108809 + 23104 = 1053^2 + 152^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131913 - 2⁵ = 1131881 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1131917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565956 + 565957.

It is an arithmetic number, because the mean of its divisors is an integer number (565957).

2^1131913 is an apocalyptic number.

It is an amenable number.

1131913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131913 is an equidigital number, since it uses as much as digits as its factorization.

1131913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81, while the sum is 19.

The square root of 1131913 is about 1063.9140002839. The cubic root of 1131913 is about 104.2167876843.

The spelling of 1131913 in words is "one million, one hundred thirty-one thousand, nine hundred thirteen".