1000998007897 has 2 divisors, whose sum is σ = 1000998007898. Its totient is φ = 1000998007896.

The previous prime is 1000998007829. The next prime is 1000998007913. The reversal of 1000998007897 is 7987008990001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970548106896 + 30449901001 = 985164^2 + 174499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000998007897 - 2⁷ = 1000998007769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000998007297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500499003948 + 500499003949.

It is an arithmetic number, because the mean of its divisors is an integer number (500499003949).

Almost surely, 2^{1000998007897} is an apocalyptic number.

It is an amenable number.

1000998007897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000998007897 is an equidigital number, since it uses as much as digits as its factorization.

1000998007897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 58.

The spelling of 1000998007897 in words is "one trillion, nine hundred ninety-eight million, seven thousand, eight hundred ninety-seven".