1131292397 has 16 divisors (see below), whose sum is σ = 1180852992. Its totient is φ = 1083001920.

The previous prime is 1131292369. The next prime is 1131292423. The reversal of 1131292397 is 7932921311.

It is a cyclic number.

It is not a de Polignac number, because 1131292397 - 2¹⁸ = 1131030253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131292397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131292307) 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 in 15 ways as a sum of consecutive naturals, for example, 563798 + ... + 565800.

It is an arithmetic number, because the mean of its divisors is an integer number (73803312).

Almost surely, 2^1131292397 is an apocalyptic number.

It is an amenable number.

1131292397 is a deficient number, since it is larger than the sum of its proper divisors (49560595).

1131292397 is a wasteful number, since it uses less digits than its factorization.

1131292397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308.

The product of its digits is 20412, while the sum is 38.

The square root of 1131292397 is about 33634.6903806174. The cubic root of 1131292397 is about 1041.9773761149.

The spelling of 1131292397 in words is "one billion, one hundred thirty-one million, two hundred ninety-two thousand, three hundred ninety-seven".