1002321979 has 2 divisors, whose sum is σ = 1002321980. Its totient is φ = 1002321978.

The previous prime is 1002321949. The next prime is 1002321997. The reversal of 1002321979 is 9791232001.

It is a happy number.

Together with next prime (1002321997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1002321979 - 2⁷ = 1002321851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002321919) 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 as a sum of consecutive naturals, namely, 501160989 + 501160990.

It is an arithmetic number, because the mean of its divisors is an integer number (501160990).

Almost surely, 2^1002321979 is an apocalyptic number.

1002321979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002321979 is an equidigital number, since it uses as much as digits as its factorization.

1002321979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1002321979 is about 31659.4690258697. The cubic root of 1002321979 is about 1000.7733947064.

The spelling of 1002321979 in words is "one billion, two million, three hundred twenty-one thousand, nine hundred seventy-nine".