85994137 has 2 divisors, whose sum is σ = 85994138. Its totient is φ = 85994136.

The previous prime is 85994123. The next prime is 85994141. The reversal of 85994137 is 73149958.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77951241 + 8042896 = 8829^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 85994137 - 2¹¹ = 85992089 is a prime.

It is equal to p_4998169 and since 85994137 and 4998169 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85994197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42997068 + 42997069.

It is an arithmetic number, because the mean of its divisors is an integer number (42997069).

Almost surely, 2^85994137 is an apocalyptic number.

It is an amenable number.

85994137 is a deficient number, since it is larger than the sum of its proper divisors (1).

85994137 is an equidigital number, since it uses as much as digits as its factorization.

85994137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 85994137 is about 9273.3023783332. The cubic root of 85994137 is about 441.3904652755.

The spelling of 85994137 in words is "eighty-five million, nine hundred ninety-four thousand, one hundred thirty-seven".