789001 has 2 divisors, whose sum is σ = 789002. Its totient is φ = 789000.

The previous prime is 788999. The next prime is 789017. The reversal of 789001 is 100987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783225 + 5776 = 885^2 + 76^2 .

It is an emirp because it is prime and its reverse (100987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 789001 - 2¹ = 788999 is a prime.

Together with 788999, it forms a pair of twin primes.

It is an Ulam number.

789001 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (789031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394500 + 394501.

It is an arithmetic number, because the mean of its divisors is an integer number (394501).

2⁷⁸⁹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

789001 is a deficient number, since it is larger than the sum of its proper divisors (1).

789001 is an equidigital number, since it uses as much as digits as its factorization.

789001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 789001 is about 888.2572825482. The cubic root of 789001 is about 92.4043715878.

Adding to 789001 its reverse (100987), we get a palindrome (889988).

The spelling of 789001 in words is "seven hundred eighty-nine thousand, one".