789042647 has 4 divisors (see below), whose sum is σ = 807392520. Its totient is φ = 770692776.

The previous prime is 789042601. The next prime is 789042671. The reversal of 789042647 is 746240987.

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

It is a cyclic number.

It is not a de Polignac number, because 789042647 - 2²⁶ = 721933783 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 (789042677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9174872 + ... + 9174957.

It is an arithmetic number, because the mean of its divisors is an integer number (201848130).

Almost surely, 2^789042647 is an apocalyptic number.

789042647 is a deficient number, since it is larger than the sum of its proper divisors (18349873).

789042647 is a wasteful number, since it uses less digits than its factorization.

789042647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18349872.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 789042647 is about 28089.9029368206. The cubic root of 789042647 is about 924.0599739780.

The spelling of 789042647 in words is "seven hundred eighty-nine million, forty-two thousand, six hundred forty-seven".