1101023009 has 2 divisors, whose sum is σ = 1101023010. Its totient is φ = 1101023008.

The previous prime is 1101022997. The next prime is 1101023059. The reversal of 1101023009 is 9003201011.

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., 648822784 + 452200225 = 25472^2 + 21265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101023009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101023059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550511504 + 550511505.

It is an arithmetic number, because the mean of its divisors is an integer number (550511505).

Almost surely, 2^1101023009 is an apocalyptic number.

It is an amenable number.

1101023009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101023009 is an equidigital number, since it uses as much as digits as its factorization.

1101023009 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 1101023009 is about 33181.6667604266. Note that the first 3 decimals coincide. The cubic root of 1101023009 is about 1032.6000259548.

The spelling of 1101023009 in words is "one billion, one hundred one million, twenty-three thousand, nine".