85617863 has 2 divisors, whose sum is σ = 85617864. Its totient is φ = 85617862.

The previous prime is 85617853. The next prime is 85617871. The reversal of 85617863 is 36871658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85617863 - 2⁸ = 85617607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85617803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42808931 + 42808932.

It is an arithmetic number, because the mean of its divisors is an integer number (42808932).

Almost surely, 2^85617863 is an apocalyptic number.

85617863 is a deficient number, since it is larger than the sum of its proper divisors (1).

85617863 is an equidigital number, since it uses as much as digits as its factorization.

85617863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 85617863 is about 9252.9921106634. The cubic root of 85617863 is about 440.7457446401.

The spelling of 85617863 in words is "eighty-five million, six hundred seventeen thousand, eight hundred sixty-three".