1021633369 has 3 divisors (see below), whose sum is σ = 1021665333. Its totient is φ = 1021601406.

The previous prime is 1021633351. The next prime is 1021633397. The reversal of 1021633369 is 9633361201.

The square root of 1021633369 is 31963.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9633361201 = 29 ⋅332184869.

It is not a de Polignac number, because 1021633369 - 2¹¹ = 1021631321 is a prime.

It is a super-2 number, since 2×1021633369² = 2087469481308580322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021633399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15982 + ... + 47944.

It is an arithmetic number, because the mean of its divisors is an integer number (340555111).

Almost surely, 2^1021633369 is an apocalyptic number.

1021633369 is the 31963-rd square number.

1021633369 is the 15982-nd centered octagonal number.

It is an amenable number.

1021633369 is a deficient number, since it is larger than the sum of its proper divisors (31964).

1021633369 is an frugal number, since it uses more digits than its factorization.

1021633369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63926 (or 31963 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 34.

The cubic root of 1021633369 is about 1007.1597387998.

The spelling of 1021633369 in words is "one billion, twenty-one million, six hundred thirty-three thousand, three hundred sixty-nine".