39394666947 has 6 divisors (see below), whose sum is σ = 52526680972. Its totient is φ = 26262882112.

The previous prime is 39394666943. The next prime is 39394666981. The reversal of 39394666947 is 74966649393.

It is not a de Polignac number, because 39394666947 - 2² = 39394666943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39394666943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286483 + ... + 401075.

Almost surely, 2^39394666947 is an apocalyptic number.

39394666947 is a deficient number, since it is larger than the sum of its proper divisors (13132014025).

39394666947 is an frugal number, since it uses more digits than its factorization.

39394666947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229189 (or 114596 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 66.

The spelling of 39394666947 in words is "thirty-nine billion, three hundred ninety-four million, six hundred sixty-six thousand, nine hundred forty-seven".