3954979494989 has 2 divisors, whose sum is σ = 3954979494990. Its totient is φ = 3954979494988.

The previous prime is 3954979494953. The next prime is 3954979495021. The reversal of 3954979494989 is 9894949794593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3463637377225 + 491342117764 = 1861085^2 + 700958^2 .

It is an emirp because it is prime and its reverse (9894949794593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3954979494989 - 2²⁰ = 3954978446413 is a prime.

It is a super-2 number, since 2×3954979494989² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3954979494919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1977489747494 + 1977489747495.

It is an arithmetic number, because the mean of its divisors is an integer number (1977489747495).

Almost surely, 2^{3954979494989} is an apocalyptic number.

It is an amenable number.

3954979494989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3954979494989 is an equidigital number, since it uses as much as digits as its factorization.

3954979494989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28570268160, while the sum is 89.

The spelling of 3954979494989 in words is "three trillion, nine hundred fifty-four billion, nine hundred seventy-nine million, four hundred ninety-four thousand, nine hundred eighty-nine".