1166019997 has 2 divisors, whose sum is σ = 1166019998. Its totient is φ = 1166019996.

The previous prime is 1166019991. The next prime is 1166020027. The reversal of 1166019997 is 7999106611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732297721 + 433722276 = 27061^2 + 20826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166019997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1166019997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166019991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583009998 + 583009999.

It is an arithmetic number, because the mean of its divisors is an integer number (583009999).

Almost surely, 2^1166019997 is an apocalyptic number.

It is an amenable number.

1166019997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166019997 is an equidigital number, since it uses as much as digits as its factorization.

1166019997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 49.

The square root of 1166019997 is about 34147.0349664506. The cubic root of 1166019997 is about 1052.5320589870.

The spelling of 1166019997 in words is "one billion, one hundred sixty-six million, nineteen thousand, nine hundred ninety-seven".