47985837997 has 2 divisors, whose sum is σ = 47985837998. Its totient is φ = 47985837996.

The previous prime is 47985837937. The next prime is 47985838027. The reversal of 47985837997 is 79973858974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47951802441 + 34035556 = 218979^2 + 5834^2 .

It is a cyclic number.

It is not a de Polignac number, because 47985837997 - 2²³ = 47977449389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47985837937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23992918998 + 23992918999.

It is an arithmetic number, because the mean of its divisors is an integer number (23992918999).

Almost surely, 2^47985837997 is an apocalyptic number.

It is an amenable number.

47985837997 is a deficient number, since it is larger than the sum of its proper divisors (1).

47985837997 is an equidigital number, since it uses as much as digits as its factorization.

47985837997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960180480, while the sum is 76.

The spelling of 47985837997 in words is "forty-seven billion, nine hundred eighty-five million, eight hundred thirty-seven thousand, nine hundred ninety-seven".