85117477 has 2 divisors, whose sum is σ = 85117478. Its totient is φ = 85117476.

The previous prime is 85117433. The next prime is 85117507. The reversal of 85117477 is 77471158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77422401 + 7695076 = 8799^2 + 2774^2 .

It is a cyclic number.

It is not a de Polignac number, because 85117477 - 2¹⁵ = 85084709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85117177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42558738 + 42558739.

It is an arithmetic number, because the mean of its divisors is an integer number (42558739).

Almost surely, 2^85117477 is an apocalyptic number.

It is an amenable number.

85117477 is a deficient number, since it is larger than the sum of its proper divisors (1).

85117477 is an equidigital number, since it uses as much as digits as its factorization.

85117477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54880, while the sum is 40.

The square root of 85117477 is about 9225.9133423201. The cubic root of 85117477 is about 439.8854333261.

The spelling of 85117477 in words is "eighty-five million, one hundred seventeen thousand, four hundred seventy-seven".