85806397 has 2 divisors, whose sum is σ = 85806398. Its totient is φ = 85806396.

The previous prime is 85806373. The next prime is 85806433. The reversal of 85806397 is 79360858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74287161 + 11519236 = 8619^2 + 3394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85806397 is a prime.

It is a super-2 number, since 2×85806397² = 14725475532243218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85836397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42903198 + 42903199.

It is an arithmetic number, because the mean of its divisors is an integer number (42903199).

Almost surely, 2^85806397 is an apocalyptic number.

It is an amenable number.

85806397 is a deficient number, since it is larger than the sum of its proper divisors (1).

85806397 is an equidigital number, since it uses as much as digits as its factorization.

85806397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 85806397 is about 9263.1742399676. The cubic root of 85806397 is about 441.0690207905.

The spelling of 85806397 in words is "eighty-five million, eight hundred six thousand, three hundred ninety-seven".