1020031109 has 2 divisors, whose sum is σ = 1020031110. Its totient is φ = 1020031108.

The previous prime is 1020031091. The next prime is 1020031141. The reversal of 1020031109 is 9011300201.

It is a happy number.

Together with previous prime (1020031091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 735602884 + 284428225 = 27122^2 + 16865^2 .

It is an emirp because it is prime and its reverse (9011300201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020031109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020031609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510015554 + 510015555.

It is an arithmetic number, because the mean of its divisors is an integer number (510015555).

Almost surely, 2^1020031109 is an apocalyptic number.

It is an amenable number.

1020031109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020031109 is an equidigital number, since it uses as much as digits as its factorization.

1020031109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1020031109 is about 31937.9258719160. The cubic root of 1020031109 is about 1006.6329431247.

The spelling of 1020031109 in words is "one billion, twenty million, thirty-one thousand, one hundred nine".