47387471657 has 2 divisors, whose sum is σ = 47387471658. Its totient is φ = 47387471656.

The previous prime is 47387471653. The next prime is 47387471749. The reversal of 47387471657 is 75617478374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47097246361 + 290225296 = 217019^2 + 17036^2 .

It is a cyclic number.

It is not a de Polignac number, because 47387471657 - 2² = 47387471653 is a prime.

It is a super-3 number, since 3×47387471657³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47387471596 and 47387471605.

It is not a weakly prime, because it can be changed into another prime (47387471653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23693735828 + 23693735829.

It is an arithmetic number, because the mean of its divisors is an integer number (23693735829).

Almost surely, 2^47387471657 is an apocalyptic number.

It is an amenable number.

47387471657 is a deficient number, since it is larger than the sum of its proper divisors (1).

47387471657 is an equidigital number, since it uses as much as digits as its factorization.

47387471657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27659520, while the sum is 59.

The spelling of 47387471657 in words is "forty-seven billion, three hundred eighty-seven million, four hundred seventy-one thousand, six hundred fifty-seven".