1001099965 has 8 divisors (see below), whose sum is σ = 1208265048. Its totient is φ = 796249920.

The previous prime is 1001099903. The next prime is 1001099971. The reversal of 1001099965 is 5699901001.

It can be written as a sum of positive squares in 4 ways, for example, as 275659609 + 725440356 = 16603^2 + 26934^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001099965 - 2⁷ = 1001099837 is a prime.

It is a super-2 number, since 2×1001099965² = 2004402279846002450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 577806 + ... + 579535.

It is an arithmetic number, because the mean of its divisors is an integer number (151033131).

Almost surely, 2^1001099965 is an apocalyptic number.

It is an amenable number.

1001099965 is a deficient number, since it is larger than the sum of its proper divisors (207165083).

1001099965 is a wasteful number, since it uses less digits than its factorization.

1001099965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157519.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 1001099965 is about 31640.1637954041. The cubic root of 1001099965 is about 1000.3665206462.

The spelling of 1001099965 in words is "one billion, one million, ninety-nine thousand, nine hundred sixty-five".