1012919009 has 2 divisors, whose sum is σ = 1012919010. Its totient is φ = 1012919008.

The previous prime is 1012918997. The next prime is 1012919053. The reversal of 1012919009 is 9009192101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865830625 + 147088384 = 29425^2 + 12128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012919009 - 2¹⁶ = 1012853473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012919209) 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, 506459504 + 506459505.

It is an arithmetic number, because the mean of its divisors is an integer number (506459505).

Almost surely, 2^1012919009 is an apocalyptic number.

It is an amenable number.

1012919009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012919009 is an equidigital number, since it uses as much as digits as its factorization.

1012919009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 1012919009 is about 31826.3885635804. The cubic root of 1012919009 is about 1004.2879237635.

The spelling of 1012919009 in words is "one billion, twelve million, nine hundred nineteen thousand, nine".