1002201997 has 2 divisors, whose sum is σ = 1002201998. Its totient is φ = 1002201996.

The previous prime is 1002201983. The next prime is 1002202031. The reversal of 1002201997 is 7991022001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 622302916 + 379899081 = 24946^2 + 19491^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002201997 - 2¹⁹ = 1001677709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002201097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501100998 + 501100999.

It is an arithmetic number, because the mean of its divisors is an integer number (501100999).

Almost surely, 2^1002201997 is an apocalyptic number.

It is an amenable number.

1002201997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002201997 is an equidigital number, since it uses as much as digits as its factorization.

1002201997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1002201997 is about 31657.5740858329. The cubic root of 1002201997 is about 1000.7334609036.

Adding to 1002201997 its reverse (7991022001), we get a palindrome (8993223998).

The spelling of 1002201997 in words is "one billion, two million, two hundred one thousand, nine hundred ninety-seven".