787654321 has 8 divisors (see below), whose sum is σ = 807559200. Its totient is φ = 767782560.

The previous prime is 787654303. The next prime is 787654339. The reversal of 787654321 is 123456787.

787654321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (787654303) and next prime (787654339).

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 787654321 - 2⁵ = 787654289 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787654921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43990 + ... + 59248.

It is an arithmetic number, because the mean of its divisors is an integer number (100944900).

Almost surely, 2^787654321 is an apocalyptic number.

It is an amenable number.

787654321 is a deficient number, since it is larger than the sum of its proper divisors (19904879).

787654321 is a wasteful number, since it uses less digits than its factorization.

787654321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16559.

The product of its digits is 282240, while the sum is 43.

The square root of 787654321 is about 28065.1798675868. The cubic root of 787654321 is about 923.5176924971.

The spelling of 787654321 in words is "seven hundred eighty-seven million, six hundred fifty-four thousand, three hundred twenty-one".