1939109 has 2 divisors, whose sum is σ = 1939110. Its totient is φ = 1939108.

The previous prime is 1939103. The next prime is 1939117. The reversal of 1939109 is 9019391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1216609 + 722500 = 1103^2 + 850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1939109 is a prime.

It is a Sophie Germain prime.

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 (1939103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969554 + 969555.

It is an arithmetic number, because the mean of its divisors is an integer number (969555).

2^1939109 is an apocalyptic number.

It is an amenable number.

1939109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939109 is an equidigital number, since it uses as much as digits as its factorization.

1939109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1939109 is about 1392.5189406252. The cubic root of 1939109 is about 124.7002738885.

It can be divided in two parts, 1939 and 109, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1939109 in words is "one million, nine hundred thirty-nine thousand, one hundred nine".