1109995897 has 2 divisors, whose sum is σ = 1109995898. Its totient is φ = 1109995896.

The previous prime is 1109995883. The next prime is 1109995961. The reversal of 1109995897 is 7985999011.

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., 1106294121 + 3701776 = 33261^2 + 1924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1109995897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1109995837) 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, 554997948 + 554997949.

It is an arithmetic number, because the mean of its divisors is an integer number (554997949).

Almost surely, 2^1109995897 is an apocalyptic number.

It is an amenable number.

1109995897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109995897 is an equidigital number, since it uses as much as digits as its factorization.

1109995897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 58.

The square root of 1109995897 is about 33316.6009220629. The cubic root of 1109995897 is about 1035.3975296987.

The spelling of 1109995897 in words is "one billion, one hundred nine million, nine hundred ninety-five thousand, eight hundred ninety-seven".