1069821997 has 8 divisors (see below), whose sum is σ = 1115269632. Its totient is φ = 1025058000.

The previous prime is 1069821953. The next prime is 1069822001. The reversal of 1069821997 is 7991289601.

1069821997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1069821997 - 2¹⁵ = 1069789229 is a prime.

It is a super-2 number, since 2×1069821997² = 2289038210530136018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1069822997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167713 + ... + 173974.

It is an arithmetic number, because the mean of its divisors is an integer number (139408704).

Almost surely, 2^1069821997 is an apocalyptic number.

It is an amenable number.

1069821997 is a deficient number, since it is larger than the sum of its proper divisors (45447635).

1069821997 is a wasteful number, since it uses less digits than its factorization.

1069821997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341819.

The product of its (nonzero) digits is 489888, while the sum is 52.

The square root of 1069821997 is about 32708.1334991772. The cubic root of 1069821997 is about 1022.7524011501.

The spelling of 1069821997 in words is "one billion, sixty-nine million, eight hundred twenty-one thousand, nine hundred ninety-seven".