85547061997 has 2 divisors, whose sum is σ = 85547061998. Its totient is φ = 85547061996.

The previous prime is 85547061947. The next prime is 85547062021. The reversal of 85547061997 is 79916074558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75694315876 + 9852746121 = 275126^2 + 99261^2 .

It is a cyclic number.

It is not a de Polignac number, because 85547061997 - 2¹⁵ = 85547029229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85547061907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42773530998 + 42773530999.

It is an arithmetic number, because the mean of its divisors is an integer number (42773530999).

Almost surely, 2^85547061997 is an apocalyptic number.

It is an amenable number.

85547061997 is a deficient number, since it is larger than the sum of its proper divisors (1).

85547061997 is an equidigital number, since it uses as much as digits as its factorization.

85547061997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19051200, while the sum is 61.

The spelling of 85547061997 in words is "eighty-five billion, five hundred forty-seven million, sixty-one thousand, nine hundred ninety-seven".