85438417 has 2 divisors, whose sum is σ = 85438418. Its totient is φ = 85438416.

The previous prime is 85438403. The next prime is 85438427. The reversal of 85438417 is 71483458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77281681 + 8156736 = 8791^2 + 2856^2 .

It is a cyclic number.

It is not a de Polignac number, because 85438417 - 2⁷ = 85438289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85438417.

It is not a weakly prime, because it can be changed into another prime (85438427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42719208 + 42719209.

It is an arithmetic number, because the mean of its divisors is an integer number (42719209).

Almost surely, 2^85438417 is an apocalyptic number.

It is an amenable number.

85438417 is a deficient number, since it is larger than the sum of its proper divisors (1).

85438417 is an equidigital number, since it uses as much as digits as its factorization.

85438417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 85438417 is about 9243.2903773494. The cubic root of 85438417 is about 440.4376104208.

The spelling of 85438417 in words is "eighty-five million, four hundred thirty-eight thousand, four hundred seventeen".