1131378297 has 16 divisors (see below), whose sum is σ = 1759190400. Its totient is φ = 646501296.

The previous prime is 1131378179. The next prime is 1131378299. The reversal of 1131378297 is 7928731311.

It is not a de Polignac number, because 1131378297 - 2¹¹ = 1131376249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131378299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548718 + ... + 550775.

It is an arithmetic number, because the mean of its divisors is an integer number (109949400).

Almost surely, 2^1131378297 is an apocalyptic number.

It is an amenable number.

1131378297 is a deficient number, since it is larger than the sum of its proper divisors (627812103).

1131378297 is an equidigital number, since it uses as much as digits as its factorization.

1131378297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099517 (or 1099503 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 1131378297 is about 33635.9673117929. The cubic root of 1131378297 is about 1042.0037481921.

The spelling of 1131378297 in words is "one billion, one hundred thirty-one million, three hundred seventy-eight thousand, two hundred ninety-seven".