389696646989 has 8 divisors (see below), whose sum is σ = 419722729272. Its totient is φ = 359677624320.

The previous prime is 389696646967. The next prime is 389696647027. The reversal of 389696646989 is 989646696983.

It can be written as a sum of positive squares in 4 ways, for example, as 125629131364 + 264067515625 = 354442^2 + 513875^2 .

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 389696646989 - 2³² = 385401679693 is a prime.

It is a super-2 number, since 2×389696646989² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389696648989) 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, 1649972 + ... + 1871309.

It is an arithmetic number, because the mean of its divisors is an integer number (52465341159).

Almost surely, 2^389696646989 is an apocalyptic number.

It is an amenable number.

389696646989 is a deficient number, since it is larger than the sum of its proper divisors (30026082283).

389696646989 is a wasteful number, since it uses less digits than its factorization.

389696646989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529807.

The product of its digits is 6530347008, while the sum is 83.

The spelling of 389696646989 in words is "three hundred eighty-nine billion, six hundred ninety-six million, six hundred forty-six thousand, nine hundred eighty-nine".