85139762093 has 2 divisors, whose sum is σ = 85139762094. Its totient is φ = 85139762092.

The previous prime is 85139762023. The next prime is 85139762153. The reversal of 85139762093 is 39026793158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59031019369 + 26108742724 = 242963^2 + 161582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85139762093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85139762003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42569881046 + 42569881047.

It is an arithmetic number, because the mean of its divisors is an integer number (42569881047).

Almost surely, 2^85139762093 is an apocalyptic number.

It is an amenable number.

85139762093 is a deficient number, since it is larger than the sum of its proper divisors (1).

85139762093 is an equidigital number, since it uses as much as digits as its factorization.

85139762093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 85139762093 in words is "eighty-five billion, one hundred thirty-nine million, seven hundred sixty-two thousand, ninety-three".