1101306509 has 4 divisors (see below), whose sum is σ = 1102170204. Its totient is φ = 1100442816.

The previous prime is 1101306469. The next prime is 1101306511. The reversal of 1101306509 is 9056031011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9056031011 = 13229 ⋅684559.

It can be written as a sum of positive squares in 2 ways, for example, as 505800100 + 595506409 = 22490^2 + 24403^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101306509 - 2¹² = 1101302413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101306599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429932 + ... + 432485.

It is an arithmetic number, because the mean of its divisors is an integer number (275542551).

Almost surely, 2^1101306509 is an apocalyptic number.

It is an amenable number.

1101306509 is a deficient number, since it is larger than the sum of its proper divisors (863695).

1101306509 is an equidigital number, since it uses as much as digits as its factorization.

1101306509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863694.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 1101306509 is about 33185.9384227718. The cubic root of 1101306509 is about 1032.6886456545.

The spelling of 1101306509 in words is "one billion, one hundred one million, three hundred six thousand, five hundred nine".