72385128973 has 2 divisors, whose sum is σ = 72385128974. Its totient is φ = 72385128972.

The previous prime is 72385128943. The next prime is 72385128979. The reversal of 72385128973 is 37982158327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71945723529 + 439405444 = 268227^2 + 20962^2 .

It is a cyclic number.

It is not a de Polignac number, because 72385128973 - 2²¹ = 72383031821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72385128979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36192564486 + 36192564487.

It is an arithmetic number, because the mean of its divisors is an integer number (36192564487).

Almost surely, 2^72385128973 is an apocalyptic number.

It is an amenable number.

72385128973 is a deficient number, since it is larger than the sum of its proper divisors (1).

72385128973 is an equidigital number, since it uses as much as digits as its factorization.

72385128973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 55.

The spelling of 72385128973 in words is "seventy-two billion, three hundred eighty-five million, one hundred twenty-eight thousand, nine hundred seventy-three".