1948109 has 2 divisors, whose sum is σ = 1948110. Its totient is φ = 1948108.

The previous prime is 1948099. The next prime is 1948129. The reversal of 1948109 is 9018491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 770884 = 1085^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1948109 - 2⁸ = 1947853 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 (1948129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974054 + 974055.

It is an arithmetic number, because the mean of its divisors is an integer number (974055).

2^1948109 is an apocalyptic number.

It is an amenable number.

1948109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948109 is an equidigital number, since it uses as much as digits as its factorization.

1948109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1948109 is about 1395.7467535337. The cubic root of 1948109 is about 124.8929002634.

The spelling of 1948109 in words is "one million, nine hundred forty-eight thousand, one hundred nine".