1008997001 has 4 divisors (see below), whose sum is σ = 1017926292. Its totient is φ = 1000067712.

The previous prime is 1008996997. The next prime is 1008997009. The reversal of 1008997001 is 1007998001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1007998001 = 2039 ⋅494359.

It can be written as a sum of positive squares in 2 ways, for example, as 67980025 + 941016976 = 8245^2 + 30676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1008997001 - 2² = 1008996997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1008997009) 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 in 3 ways as a sum of consecutive naturals, for example, 4464476 + ... + 4464701.

It is an arithmetic number, because the mean of its divisors is an integer number (254481573).

Almost surely, 2^1008997001 is an apocalyptic number.

It is an amenable number.

1008997001 is a deficient number, since it is larger than the sum of its proper divisors (8929291).

1008997001 is an equidigital number, since it uses as much as digits as its factorization.

1008997001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8929290.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1008997001 is about 31764.7131421016. The cubic root of 1008997001 is about 1002.9900510175.

The spelling of 1008997001 in words is "one billion, eight million, nine hundred ninety-seven thousand, one".