8019997 has 2 divisors, whose sum is σ = 8019998. Its totient is φ = 8019996.

The previous prime is 8019989. The next prime is 8020003. The reversal of 8019997 is 7999108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5885476 + 2134521 = 2426^2 + 1461^2 .

It is a cyclic number.

It is not a de Polignac number, because 8019997 - 2³ = 8019989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8019397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4009998 + 4009999.

It is an arithmetic number, because the mean of its divisors is an integer number (4009999).

Almost surely, 2^8019997 is an apocalyptic number.

It is an amenable number.

8019997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8019997 is an equidigital number, since it uses as much as digits as its factorization.

8019997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 8019997 is about 2831.9599220328. The cubic root of 8019997 is about 200.1665030119.

The spelling of 8019997 in words is "eight million, nineteen thousand, nine hundred ninety-seven".