1945313 has 2 divisors, whose sum is σ = 1945314. Its totient is φ = 1945312.

The previous prime is 1945309. The next prime is 1945319. The reversal of 1945313 is 3135491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1926544 + 18769 = 1388^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1945313 - 2² = 1945309 is a prime.

It is not a weakly prime, because it can be changed into another prime (1945319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972656 + 972657.

It is an arithmetic number, because the mean of its divisors is an integer number (972657).

2^1945313 is an apocalyptic number.

It is an amenable number.

1945313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945313 is an equidigital number, since it uses as much as digits as its factorization.

1945313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 26.

The square root of 1945313 is about 1394.7447795206. The cubic root of 1945313 is about 124.8331213112.

The spelling of 1945313 in words is "one million, nine hundred forty-five thousand, three hundred thirteen".