1230040109 has 2 divisors, whose sum is σ = 1230040110. Its totient is φ = 1230040108.

The previous prime is 1230040093. The next prime is 1230040121. The reversal of 1230040109 is 9010400321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190940100 + 39100009 = 34510^2 + 6253^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230040109 - 2⁴ = 1230040093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230040129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615020054 + 615020055.

It is an arithmetic number, because the mean of its divisors is an integer number (615020055).

Almost surely, 2^1230040109 is an apocalyptic number.

It is an amenable number.

1230040109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230040109 is an equidigital number, since it uses as much as digits as its factorization.

1230040109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1230040109 is about 35071.9276487621. The cubic root of 1230040109 is about 1071.4529157533.

The spelling of 1230040109 in words is "one billion, two hundred thirty million, forty thousand, one hundred nine".