85166519 has 2 divisors, whose sum is σ = 85166520. Its totient is φ = 85166518.

The previous prime is 85166507. The next prime is 85166527. The reversal of 85166519 is 91566158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85166519 - 2¹² = 85162423 is a prime.

It is a super-2 number, since 2×85166519² = 14506671917154722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85168519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42583259 + 42583260.

It is an arithmetic number, because the mean of its divisors is an integer number (42583260).

Almost surely, 2^85166519 is an apocalyptic number.

85166519 is a deficient number, since it is larger than the sum of its proper divisors (1).

85166519 is an equidigital number, since it uses as much as digits as its factorization.

85166519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The square root of 85166519 is about 9228.5707994250. The cubic root of 85166519 is about 439.9698998004.

The spelling of 85166519 in words is "eighty-five million, one hundred sixty-six thousand, five hundred nineteen".