806199997 has 2 divisors, whose sum is σ = 806199998. Its totient is φ = 806199996.

The previous prime is 806199949. The next prime is 806200009. The reversal of 806199997 is 799991608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 776235321 + 29964676 = 27861^2 + 5474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-806199997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806199917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403099998 + 403099999.

It is an arithmetic number, because the mean of its divisors is an integer number (403099999).

Almost surely, 2^806199997 is an apocalyptic number.

It is an amenable number.

806199997 is a deficient number, since it is larger than the sum of its proper divisors (1).

806199997 is an equidigital number, since it uses as much as digits as its factorization.

806199997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 58.

The square root of 806199997 is about 28393.6612116155. The cubic root of 806199997 is about 930.7097511039.

The spelling of 806199997 in words is "eight hundred six million, one hundred ninety-nine thousand, nine hundred ninety-seven".