207961970647 has 4 divisors (see below), whose sum is σ = 208435688560. Its totient is φ = 207488252736.

The previous prime is 207961970627. The next prime is 207961970659. The reversal of 207961970647 is 746079169702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746079169702 = 2 ⋅373039584851.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207961970647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 207961970591 and 207961970600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207961970627) 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, 236858298 + ... + 236859175.

It is an arithmetic number, because the mean of its divisors is an integer number (52108922140).

Almost surely, 2^207961970647 is an apocalyptic number.

207961970647 is a deficient number, since it is larger than the sum of its proper divisors (473717913).

207961970647 is an equidigital number, since it uses as much as digits as its factorization.

207961970647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473717912.

The product of its (nonzero) digits is 8001504, while the sum is 58.

The spelling of 207961970647 in words is "two hundred seven billion, nine hundred sixty-one million, nine hundred seventy thousand, six hundred forty-seven".