47687124817 has 2 divisors, whose sum is σ = 47687124818. Its totient is φ = 47687124816.

The previous prime is 47687124809. The next prime is 47687124839. The reversal of 47687124817 is 71842178674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47680652881 + 6471936 = 218359^2 + 2544^2 .

It is a cyclic number.

It is not a de Polignac number, because 47687124817 - 2³ = 47687124809 is a prime.

It is not a weakly prime, because it can be changed into another prime (47687124857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23843562408 + 23843562409.

It is an arithmetic number, because the mean of its divisors is an integer number (23843562409).

Almost surely, 2^47687124817 is an apocalyptic number.

It is an amenable number.

47687124817 is a deficient number, since it is larger than the sum of its proper divisors (1).

47687124817 is an equidigital number, since it uses as much as digits as its factorization.

47687124817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4214784, while the sum is 55.

The spelling of 47687124817 in words is "forty-seven billion, six hundred eighty-seven million, one hundred twenty-four thousand, eight hundred seventeen".