85041997 has 2 divisors, whose sum is σ = 85041998. Its totient is φ = 85041996.

The previous prime is 85041977. The next prime is 85042019. The reversal of 85041997 is 79914058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74407876 + 10634121 = 8626^2 + 3261^2 .

It is a cyclic number.

It is not a de Polignac number, because 85041997 - 2²³ = 76653389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85041977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42520998 + 42520999.

It is an arithmetic number, because the mean of its divisors is an integer number (42520999).

Almost surely, 2^85041997 is an apocalyptic number.

It is an amenable number.

85041997 is a deficient number, since it is larger than the sum of its proper divisors (1).

85041997 is an equidigital number, since it uses as much as digits as its factorization.

85041997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 85041997 is about 9221.8217831402. The cubic root of 85041997 is about 439.7553684914.

It can be divided in two parts, 8504 and 1997, that added together give a palindrome (10501).

The spelling of 85041997 in words is "eighty-five million, forty-one thousand, nine hundred ninety-seven".