1021038979 has 4 divisors (see below), whose sum is σ = 1029078784. Its totient is φ = 1012999176.

The previous prime is 1021038973. The next prime is 1021039067. The reversal of 1021038979 is 9798301201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021038979 - 2¹¹ = 1021036931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021038973) 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 3 ways as a sum of consecutive naturals, for example, 4019712 + ... + 4019965.

It is an arithmetic number, because the mean of its divisors is an integer number (257269696).

Almost surely, 2^1021038979 is an apocalyptic number.

1021038979 is a deficient number, since it is larger than the sum of its proper divisors (8039805).

1021038979 is an equidigital number, since it uses as much as digits as its factorization.

1021038979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8039804.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1021038979 is about 31953.7005525182. The cubic root of 1021038979 is about 1006.9643778445.

The spelling of 1021038979 in words is "one billion, twenty-one million, thirty-eight thousand, nine hundred seventy-nine".