1149791197 has 2 divisors, whose sum is σ = 1149791198. Its totient is φ = 1149791196.

The previous prime is 1149791191. The next prime is 1149791207. The reversal of 1149791197 is 7911979411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1145551716 + 4239481 = 33846^2 + 2059^2 .

It is a cyclic number.

It is not a de Polignac number, because 1149791197 - 2³ = 1149791189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1149791197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1149791191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574895598 + 574895599.

It is an arithmetic number, because the mean of its divisors is an integer number (574895599).

Almost surely, 2^1149791197 is an apocalyptic number.

It is an amenable number.

1149791197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149791197 is an equidigital number, since it uses as much as digits as its factorization.

1149791197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 49.

The square root of 1149791197 is about 33908.5711435914. The cubic root of 1149791197 is about 1047.6261404287.

The spelling of 1149791197 in words is "one billion, one hundred forty-nine million, seven hundred ninety-one thousand, one hundred ninety-seven".