1131200197 has 2 divisors, whose sum is σ = 1131200198. Its totient is φ = 1131200196.

The previous prime is 1131200171. The next prime is 1131200219. The reversal of 1131200197 is 7910021311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1091245156 + 39955041 = 33034^2 + 6321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131200197 is a prime.

It is a super-2 number, since 2×1131200197² = 2559227771385677618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131200167) 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 as a sum of consecutive naturals, namely, 565600098 + 565600099.

It is an arithmetic number, because the mean of its divisors is an integer number (565600099).

Almost surely, 2^1131200197 is an apocalyptic number.

It is an amenable number.

1131200197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131200197 is an equidigital number, since it uses as much as digits as its factorization.

1131200197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 1131200197 is about 33633.3197439682. The cubic root of 1131200197 is about 1041.9490683952.

The spelling of 1131200197 in words is "one billion, one hundred thirty-one million, two hundred thousand, one hundred ninety-seven".