2947747394047 has 4 divisors (see below), whose sum is σ = 2958624690976. Its totient is φ = 2936870097120.

The previous prime is 2947747393999. The next prime is 2947747394057. The reversal of 2947747394047 is 7404937477492.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2947747394047 is a prime.

It is a super-2 number, since 2×2947747394047² (a number of 26 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 (2947747394057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5438648058 + ... + 5438648599.

It is an arithmetic number, because the mean of its divisors is an integer number (739656172744).

Almost surely, 2^{2947747394047} is an apocalyptic number.

2947747394047 is a deficient number, since it is larger than the sum of its proper divisors (10877296929).

2947747394047 is a wasteful number, since it uses less digits than its factorization.

2947747394047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10877296928.

The product of its (nonzero) digits is 298722816, while the sum is 67.

The spelling of 2947747394047 in words is "two trillion, nine hundred forty-seven billion, seven hundred forty-seven million, three hundred ninety-four thousand, forty-seven".