1020331139 has 2 divisors, whose sum is σ = 1020331140. Its totient is φ = 1020331138.

The previous prime is 1020331121. The next prime is 1020331163. The reversal of 1020331139 is 9311330201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020331139 - 2¹² = 1020327043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020331199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510165569 + 510165570.

It is an arithmetic number, because the mean of its divisors is an integer number (510165570).

Almost surely, 2^1020331139 is an apocalyptic number.

1020331139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020331139 is an equidigital number, since it uses as much as digits as its factorization.

1020331139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1020331139 is about 31942.6226067929. The cubic root of 1020331139 is about 1006.7316298125.

The spelling of 1020331139 in words is "one billion, twenty million, three hundred thirty-one thousand, one hundred thirty-nine".