1375109 has 2 divisors, whose sum is σ = 1375110. Its totient is φ = 1375108.

The previous prime is 1375103. The next prime is 1375111. The reversal of 1375109 is 9015731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1044484 + 330625 = 1022^2 + 575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375109 is a prime.

It is a Sophie Germain prime.

Together with 1375111, it forms a pair of twin primes.

It is a Chen 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 (1375103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687554 + 687555.

It is an arithmetic number, because the mean of its divisors is an integer number (687555).

2^1375109 is an apocalyptic number.

It is an amenable number.

1375109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375109 is an equidigital number, since it uses as much as digits as its factorization.

1375109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 1375109 is about 1172.6504167910. The cubic root of 1375109 is about 111.2019428003.

The spelling of 1375109 in words is "one million, three hundred seventy-five thousand, one hundred nine".