3989487999947 has 2 divisors, whose sum is σ = 3989487999948. Its totient is φ = 3989487999946.

The previous prime is 3989487999911. The next prime is 3989488000009. The reversal of 3989487999947 is 7499997849893.

It is a weak prime.

It is an emirp because it is prime and its reverse (7499997849893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3989487999947 - 2³² = 3985193032651 is a prime.

It is a super-2 number, since 2×3989487999947² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3989487999947.

It is not a weakly prime, because it can be changed into another prime (3989487999047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994743999973 + 1994743999974.

It is an arithmetic number, because the mean of its divisors is an integer number (1994743999974).

Almost surely, 2^{3989487999947} is an apocalyptic number.

3989487999947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989487999947 is an equidigital number, since it uses as much as digits as its factorization.

3989487999947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79996750848, while the sum is 95.

The spelling of 3989487999947 in words is "three trillion, nine hundred eighty-nine billion, four hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred forty-seven".