1161042997 has 2 divisors, whose sum is σ = 1161042998. Its totient is φ = 1161042996.

The previous prime is 1161042979. The next prime is 1161043001. The reversal of 1161042997 is 7992401611.

Together with previous prime (1161042979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799814961 + 361228036 = 28281^2 + 19006^2 .

It is an emirp because it is prime and its reverse (7992401611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161042997 - 2²⁷ = 1026825269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161042917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580521498 + 580521499.

It is an arithmetic number, because the mean of its divisors is an integer number (580521499).

Almost surely, 2^1161042997 is an apocalyptic number.

It is an amenable number.

1161042997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161042997 is an equidigital number, since it uses as much as digits as its factorization.

1161042997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1161042997 is about 34074.0810147537. The cubic root of 1161042997 is about 1051.0323925990.

The spelling of 1161042997 in words is "one billion, one hundred sixty-one million, forty-two thousand, nine hundred ninety-seven".