389004347681 has 2 divisors, whose sum is σ = 389004347682. Its totient is φ = 389004347680.

The previous prime is 389004347639. The next prime is 389004347729. The reversal of 389004347681 is 186743400983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353882214400 + 35122133281 = 594880^2 + 187409^2 .

It is a cyclic number.

It is not a de Polignac number, because 389004347681 - 2³⁰ = 387930605857 is a prime.

It is a super-2 number, since 2×389004347681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (389004347581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194502173840 + 194502173841.

It is an arithmetic number, because the mean of its divisors is an integer number (194502173841).

Almost surely, 2^389004347681 is an apocalyptic number.

It is an amenable number.

389004347681 is a deficient number, since it is larger than the sum of its proper divisors (1).

389004347681 is an equidigital number, since it uses as much as digits as its factorization.

389004347681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 389004347681 in words is "three hundred eighty-nine billion, four million, three hundred forty-seven thousand, six hundred eighty-one".