85417777 has 2 divisors, whose sum is σ = 85417778. Its totient is φ = 85417776.

The previous prime is 85417771. The next prime is 85417799. The reversal of 85417777 is 77771458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68574961 + 16842816 = 8281^2 + 4104^2 .

It is a cyclic number.

It is not a de Polignac number, because 85417777 - 2¹⁵ = 85385009 is a prime.

It is not a weakly prime, because it can be changed into another prime (85417771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42708888 + 42708889.

It is an arithmetic number, because the mean of its divisors is an integer number (42708889).

Almost surely, 2^85417777 is an apocalyptic number.

It is an amenable number.

85417777 is a deficient number, since it is larger than the sum of its proper divisors (1).

85417777 is an equidigital number, since it uses as much as digits as its factorization.

85417777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384160, while the sum is 46.

The square root of 85417777 is about 9242.1738243770. The cubic root of 85417777 is about 440.4021409574.

The spelling of 85417777 in words is "eighty-five million, four hundred seventeen thousand, seven hundred seventy-seven".