1021648633 has 4 divisors (see below), whose sum is σ = 1031764068. Its totient is φ = 1011533200.

The previous prime is 1021648613. The next prime is 1021648637. The reversal of 1021648633 is 3368461201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 937155769 + 84492864 = 30613^2 + 9192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021648633 - 2¹³ = 1021640441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021648637) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5057566 + ... + 5057767.

It is an arithmetic number, because the mean of its divisors is an integer number (257941017).

Almost surely, 2^1021648633 is an apocalyptic number.

It is an amenable number.

1021648633 is a deficient number, since it is larger than the sum of its proper divisors (10115435).

1021648633 is a wasteful number, since it uses less digits than its factorization.

1021648633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115434.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1021648633 is about 31963.2387751930. The cubic root of 1021648633 is about 1007.1647546924.

The spelling of 1021648633 in words is "one billion, twenty-one million, six hundred forty-eight thousand, six hundred thirty-three".