9139887238897 has 2 divisors, whose sum is σ = 9139887238898. Its totient is φ = 9139887238896.

The previous prime is 9139887238849. The next prime is 9139887238901. The reversal of 9139887238897 is 7988327889319.

9139887238897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8636786423281 + 503100815616 = 2938841^2 + 709296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9139887238897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9139887238897.

It is not a weakly prime, because it can be changed into another prime (9139887238817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569943619448 + 4569943619449.

It is an arithmetic number, because the mean of its divisors is an integer number (4569943619449).

Almost surely, 2^{9139887238897} is an apocalyptic number.

It is an amenable number.

9139887238897 is a deficient number, since it is larger than the sum of its proper divisors (1).

9139887238897 is an equidigital number, since it uses as much as digits as its factorization.

9139887238897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2633637888, while the sum is 82.

The spelling of 9139887238897 in words is "nine trillion, one hundred thirty-nine billion, eight hundred eighty-seven million, two hundred thirty-eight thousand, eight hundred ninety-seven".