83121327684757 has 2 divisors, whose sum is σ = 83121327684758. Its totient is φ = 83121327684756.

The previous prime is 83121327684743. The next prime is 83121327684761. The reversal of 83121327684757 is 75748672312138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75436711655761 + 7684616028996 = 8685431^2 + 2772114^2 .

It is a cyclic number.

It is not a de Polignac number, because 83121327684757 - 2¹¹ = 83121327682709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83121327684737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41560663842378 + 41560663842379.

It is an arithmetic number, because the mean of its divisors is an integer number (41560663842379).

Almost surely, 2^{83121327684757} is an apocalyptic number.

It is an amenable number.

83121327684757 is a deficient number, since it is larger than the sum of its proper divisors (1).

83121327684757 is an equidigital number, since it uses as much as digits as its factorization.

83121327684757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94832640, while the sum is 64.

The spelling of 83121327684757 in words is "eighty-three trillion, one hundred twenty-one billion, three hundred twenty-seven million, six hundred eighty-four thousand, seven hundred fifty-seven".