1020540250979 has 2 divisors, whose sum is σ = 1020540250980. Its totient is φ = 1020540250978.

The previous prime is 1020540250963. The next prime is 1020540251011. The reversal of 1020540250979 is 9790520450201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020540250979 - 2⁴ = 1020540250963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020540255979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510270125489 + 510270125490.

It is an arithmetic number, because the mean of its divisors is an integer number (510270125490).

Almost surely, 2^{1020540250979} is an apocalyptic number.

1020540250979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020540250979 is an equidigital number, since it uses as much as digits as its factorization.

1020540250979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 1020540250979 in words is "one trillion, twenty billion, five hundred forty million, two hundred fifty thousand, nine hundred seventy-nine".