103111009 has 2 divisors, whose sum is σ = 103111010. Its totient is φ = 103111008.

The previous prime is 103111007. The next prime is 103111013. The reversal of 103111009 is 900111301.

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., 102070609 + 1040400 = 10103^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 103111009 - 2¹ = 103111007 is a prime.

Together with 103111007, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 103110983 and 103111001.

It is not a weakly prime, because it can be changed into another prime (103111007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51555504 + 51555505.

It is an arithmetic number, because the mean of its divisors is an integer number (51555505).

Almost surely, 2^103111009 is an apocalyptic number.

It is an amenable number.

103111009 is a deficient number, since it is larger than the sum of its proper divisors (1).

103111009 is an equidigital number, since it uses as much as digits as its factorization.

103111009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 103111009 is about 10154.3591132085. The cubic root of 103111009 is about 468.9231556079.

The spelling of 103111009 in words is "one hundred three million, one hundred eleven thousand, nine".