1010042009 has 2 divisors, whose sum is σ = 1010042010. Its totient is φ = 1010042008.

The previous prime is 1010042003. The next prime is 1010042017. The reversal of 1010042009 is 9002400101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961000000 + 49042009 = 31000^2 + 7003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010042009 - 2⁴ = 1010041993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1010042003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505021004 + 505021005.

It is an arithmetic number, because the mean of its divisors is an integer number (505021005).

Almost surely, 2^1010042009 is an apocalyptic number.

It is an amenable number.

1010042009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010042009 is an equidigital number, since it uses as much as digits as its factorization.

1010042009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1010042009 is about 31781.1580814797. The cubic root of 1010042009 is about 1003.3361937670.

The spelling of 1010042009 in words is "one billion, ten million, forty-two thousand, nine".