1131973 has 2 divisors, whose sum is σ = 1131974. Its totient is φ = 1131972.

The previous prime is 1131961. The next prime is 1131997. The reversal of 1131973 is 3791311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 986049 + 145924 = 993^2 + 382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131973 is a prime.

1131973 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565986 + 565987.

It is an arithmetic number, because the mean of its divisors is an integer number (565987).

2^1131973 is an apocalyptic number.

It is an amenable number.

1131973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131973 is an equidigital number, since it uses as much as digits as its factorization.

1131973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567, while the sum is 25.

The square root of 1131973 is about 1063.9421976781. The cubic root of 1131973 is about 104.2186290792.

The spelling of 1131973 in words is "one million, one hundred thirty-one thousand, nine hundred seventy-three".