789666987 has 8 divisors (see below), whose sum is σ = 1081345936. Its totient is φ = 512216352.

The previous prime is 789666973. The next prime is 789666989.

It is a happy number.

789666987 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 789666987 - 2²² = 785472683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789666989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3556948 + ... + 3557169.

It is an arithmetic number, because the mean of its divisors is an integer number (135168242).

Almost surely, 2^789666987 is an apocalyptic number.

789666987 is a deficient number, since it is larger than the sum of its proper divisors (291678949).

789666987 is a wasteful number, since it uses less digits than its factorization.

789666987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114157.

The product of its digits is 54867456, while the sum is 66.

The square root of 789666987 is about 28101.0139852639. The cubic root of 789666987 is about 924.3036344469.

It can be divided in two parts, 789666 and 987, that added together give a triangular number (790653 = T₁₂₅₇).

The spelling of 789666987 in words is "seven hundred eighty-nine million, six hundred sixty-six thousand, nine hundred eighty-seven".