1020780331 has 2 divisors, whose sum is σ = 1020780332. Its totient is φ = 1020780330.

The previous prime is 1020780269. The next prime is 1020780349. The reversal of 1020780331 is 1330870201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020780331 - 2⁷ = 1020780203 is a prime.

It is a super-2 number, since 2×1020780331² = 2083984968312939122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020780296 and 1020780305.

It is not a weakly prime, because it can be changed into another prime (1020780391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510390165 + 510390166.

It is an arithmetic number, because the mean of its divisors is an integer number (510390166).

Almost surely, 2^1020780331 is an apocalyptic number.

1020780331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020780331 is an equidigital number, since it uses as much as digits as its factorization.

1020780331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1020780331 is about 31949.6530654090. The cubic root of 1020780331 is about 1006.8793431158.

The spelling of 1020780331 in words is "one billion, twenty million, seven hundred eighty thousand, three hundred thirty-one".