1945873 has 2 divisors, whose sum is σ = 1945874. Its totient is φ = 1945872.

The previous prime is 1945859. The next prime is 1945883. The reversal of 1945873 is 3785491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 762129 = 1088^2 + 873^2 .

It is an emirp because it is prime and its reverse (3785491) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945873 is a prime.

1945873 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1945843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972936 + 972937.

It is an arithmetic number, because the mean of its divisors is an integer number (972937).

2^1945873 is an apocalyptic number.

It is an amenable number.

1945873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945873 is an equidigital number, since it uses as much as digits as its factorization.

1945873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 1945873 is about 1394.9455186494. The cubic root of 1945873 is about 124.8450987909.

The spelling of 1945873 in words is "one million, nine hundred forty-five thousand, eight hundred seventy-three".