1107989 has 2 divisors, whose sum is σ = 1107990. Its totient is φ = 1107988.

The previous prime is 1107937. The next prime is 1108001. The reversal of 1107989 is 9897011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 47089 = 1030^2 + 217^2 .

It is an emirp because it is prime and its reverse (9897011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1107989 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1107929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553994 + 553995.

It is an arithmetic number, because the mean of its divisors is an integer number (553995).

2^1107989 is an apocalyptic number.

It is an amenable number.

1107989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1107989 is an equidigital number, since it uses as much as digits as its factorization.

1107989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1107989 is about 1052.6105642639. The cubic root of 1107989 is about 103.4773146077.

The spelling of 1107989 in words is "one million, one hundred seven thousand, nine hundred eighty-nine".