789945981 has 16 divisors (see below), whose sum is σ = 1160862528. Its totient is φ = 473817600.

The previous prime is 789945977. The next prime is 789945983. The reversal of 789945981 is 189549987.

It is not a de Polignac number, because 789945981 - 2² = 789945977 is a prime.

It is a super-2 number, since 2×789945981² = 1248029305796104722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (789945983) 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 15 ways as a sum of consecutive naturals, for example, 120190 + ... + 126591.

It is an arithmetic number, because the mean of its divisors is an integer number (72553908).

Almost surely, 2^789945981 is an apocalyptic number.

It is an amenable number.

789945981 is a deficient number, since it is larger than the sum of its proper divisors (370916547).

789945981 is a wasteful number, since it uses less digits than its factorization.

789945981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246892.

The product of its digits is 6531840, while the sum is 60.

The square root of 789945981 is about 28105.9776737974. The cubic root of 789945981 is about 924.4124756035.

The spelling of 789945981 in words is "seven hundred eighty-nine million, nine hundred forty-five thousand, nine hundred eighty-one".