1230785689 has 16 divisors (see below), whose sum is σ = 1440755712. Its totient is φ = 1029400848.

The previous prime is 1230785687. The next prime is 1230785693. The reversal of 1230785689 is 9865870321.

It is not a de Polignac number, because 1230785689 - 2¹ = 1230785687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230785681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547602 + ... + 549844.

It is an arithmetic number, because the mean of its divisors is an integer number (90047232).

Almost surely, 2^1230785689 is an apocalyptic number.

It is an amenable number.

1230785689 is a deficient number, since it is larger than the sum of its proper divisors (209970023).

1230785689 is a wasteful number, since it uses less digits than its factorization.

1230785689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 1230785689 is about 35082.5553373753. Note that the first 3 decimals coincide. The cubic root of 1230785689 is about 1071.6693565308.

The spelling of 1230785689 in words is "one billion, two hundred thirty million, seven hundred eighty-five thousand, six hundred eighty-nine".