47631978697 has 2 divisors, whose sum is σ = 47631978698. Its totient is φ = 47631978696.

The previous prime is 47631978679. The next prime is 47631978727. The reversal of 47631978697 is 79687913674.

Together with previous prime (47631978679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35591086336 + 12040892361 = 188656^2 + 109731^2 .

It is a cyclic number.

It is not a de Polignac number, because 47631978697 - 2²³ = 47623590089 is a prime.

It is not a weakly prime, because it can be changed into another prime (47631978607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23815989348 + 23815989349.

It is an arithmetic number, because the mean of its divisors is an integer number (23815989349).

Almost surely, 2^47631978697 is an apocalyptic number.

It is an amenable number.

47631978697 is a deficient number, since it is larger than the sum of its proper divisors (1).

47631978697 is an equidigital number, since it uses as much as digits as its factorization.

47631978697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96018048, while the sum is 67.

The spelling of 47631978697 in words is "forty-seven billion, six hundred thirty-one million, nine hundred seventy-eight thousand, six hundred ninety-seven".