789646987 has 4 divisors (see below), whose sum is σ = 797465376. Its totient is φ = 781828600.

The previous prime is 789646961. The next prime is 789646999.

789646987 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789646987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789646937) 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, 3909043 + ... + 3909244.

It is an arithmetic number, because the mean of its divisors is an integer number (199366344).

Almost surely, 2^789646987 is an apocalyptic number.

789646987 is a deficient number, since it is larger than the sum of its proper divisors (7818389).

789646987 is a wasteful number, since it uses less digits than its factorization.

789646987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818388.

The product of its digits is 36578304, while the sum is 64.

The square root of 789646987 is about 28100.6581239657. The cubic root of 789646987 is about 924.2958310610.

The spelling of 789646987 in words is "seven hundred eighty-nine million, six hundred forty-six thousand, nine hundred eighty-seven".