1989107 has 2 divisors, whose sum is σ = 1989108. Its totient is φ = 1989106.

The previous prime is 1989101. The next prime is 1989131. The reversal of 1989107 is 7019891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1989107 - 2⁸ = 1988851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1989101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994553 + 994554.

It is an arithmetic number, because the mean of its divisors is an integer number (994554).

2^1989107 is an apocalyptic number.

1989107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989107 is an equidigital number, since it uses as much as digits as its factorization.

1989107 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 1989107 is about 1410.3570469920. The cubic root of 1989107 is about 125.7629497867.

The spelling of 1989107 in words is "one million, nine hundred eighty-nine thousand, one hundred seven".