3217998997 has 2 divisors, whose sum is σ = 3217998998. Its totient is φ = 3217998996.

The previous prime is 3217998991. The next prime is 3217999061. The reversal of 3217998997 is 7998997123.

It is an a-pointer prime, because the next prime (3217999061) can be obtained adding 3217998997 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2449656036 + 768342961 = 49494^2 + 27719^2 .

It is a cyclic number.

It is not a de Polignac number, because 3217998997 - 2³¹ = 1070515349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3217998991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608999498 + 1608999499.

It is an arithmetic number, because the mean of its divisors is an integer number (1608999499).

Almost surely, 2^3217998997 is an apocalyptic number.

It is an amenable number.

3217998997 is a deficient number, since it is larger than the sum of its proper divisors (1).

3217998997 is an equidigital number, since it uses as much as digits as its factorization.

3217998997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15431472, while the sum is 64.

The square root of 3217998997 is about 56727.4095742085. The cubic root of 3217998997 is about 1476.3703051528.

The spelling of 3217998997 in words is "three billion, two hundred seventeen million, nine hundred ninety-eight thousand, nine hundred ninety-seven".