85980317 has 2 divisors, whose sum is σ = 85980318. Its totient is φ = 85980316.

The previous prime is 85980313. The next prime is 85980347. The reversal of 85980317 is 71308958.

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., 84750436 + 1229881 = 9206^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 85980317 - 2² = 85980313 is a prime.

It is a super-2 number, since 2×85980317² = 14785229822840978, which contains 22 as substring.

It is equal to p_4997408 and since 85980317 and 4997408 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85980313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42990158 + 42990159.

It is an arithmetic number, because the mean of its divisors is an integer number (42990159).

Almost surely, 2^85980317 is an apocalyptic number.

It is an amenable number.

85980317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85980317 is an equidigital number, since it uses as much as digits as its factorization.

85980317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 85980317 is about 9272.5571985294. The cubic root of 85980317 is about 441.3668189230.

The spelling of 85980317 in words is "eighty-five million, nine hundred eighty thousand, three hundred seventeen".