1007989 has 4 divisors (see below), whose sum is σ = 1013740. Its totient is φ = 1002240.

The previous prime is 1007977. The next prime is 1008001. The reversal of 1007989 is 9897001.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1007977) and next prime (1008001).

It can be written as a sum of positive squares in 2 ways, for example, as 72900 + 935089 = 270^2 + 967^2 .

It is a cyclic number.

It is not a de Polignac number, because 1007989 - 2⁵ = 1007957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1007939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2604 + ... + 2965.

It is an arithmetic number, because the mean of its divisors is an integer number (253435).

2^1007989 is an apocalyptic number.

It is an amenable number.

1007989 is a deficient number, since it is larger than the sum of its proper divisors (5751).

1007989 is an equidigital number, since it uses as much as digits as its factorization.

1007989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1007989 is about 1003.9865536948. The cubic root of 1007989 is about 100.2655939739.

The spelling of 1007989 in words is "one million, seven thousand, nine hundred eighty-nine".