1021768979 has 8 divisors (see below), whose sum is σ = 1273893888. Its totient is φ = 796183560.

The previous prime is 1021768963. The next prime is 1021768981. The reversal of 1021768979 is 9798671201.

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 1021768979 - 2⁴ = 1021768963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021764979) 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, 6634787 + ... + 6634940.

It is an arithmetic number, because the mean of its divisors is an integer number (159236736).

Almost surely, 2^1021768979 is an apocalyptic number.

1021768979 is a deficient number, since it is larger than the sum of its proper divisors (252124909).

1021768979 is a wasteful number, since it uses less digits than its factorization.

1021768979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13269745.

The product of its (nonzero) digits is 381024, while the sum is 50.

The square root of 1021768979 is about 31965.1212886796. The cubic root of 1021768979 is about 1007.2042997593.

The spelling of 1021768979 in words is "one billion, twenty-one million, seven hundred sixty-eight thousand, nine hundred seventy-nine".