72839750971789 has 2 divisors, whose sum is σ = 72839750971790. Its totient is φ = 72839750971788.

The previous prime is 72839750971777. The next prime is 72839750971831. The reversal of 72839750971789 is 98717905793827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37636200477225 + 35203550494564 = 6134835^2 + 5933258^2 .

It is a cyclic number.

It is not a de Polignac number, because 72839750971789 - 2¹³ = 72839750963597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72839750971759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36419875485894 + 36419875485895.

It is an arithmetic number, because the mean of its divisors is an integer number (36419875485895).

Almost surely, 2^{72839750971789} is an apocalyptic number.

It is an amenable number.

72839750971789 is a deficient number, since it is larger than the sum of its proper divisors (1).

72839750971789 is an equidigital number, since it uses as much as digits as its factorization.

72839750971789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360631680, while the sum is 82.

The spelling of 72839750971789 in words is "seventy-two trillion, eight hundred thirty-nine billion, seven hundred fifty million, nine hundred seventy-one thousand, seven hundred eighty-nine".