782664989 has 8 divisors (see below), whose sum is σ = 841074048. Its totient is φ = 725630400.

The previous prime is 782664977. The next prime is 782664991. The reversal of 782664989 is 989466287.

782664989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 782664989 - 2⁸ = 782664733 is a prime.

It is a super-2 number, since 2×782664989² = 1225128970012740242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782664919) 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, 342437 + ... + 344714.

It is an arithmetic number, because the mean of its divisors is an integer number (105134256).

Almost surely, 2^782664989 is an apocalyptic number.

It is an amenable number.

782664989 is a deficient number, since it is larger than the sum of its proper divisors (58409059).

782664989 is a wasteful number, since it uses less digits than its factorization.

782664989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687235.

The product of its digits is 10450944, while the sum is 59.

The square root of 782664989 is about 27976.1503606197. The cubic root of 782664989 is about 921.5635781325.

The spelling of 782664989 in words is "seven hundred eighty-two million, six hundred sixty-four thousand, nine hundred eighty-nine".