1946475985 has 4 divisors (see below), whose sum is σ = 2335771188. Its totient is φ = 1557180784.

The previous prime is 1946475977. The next prime is 1946475997. The reversal of 1946475985 is 5895746491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5895746491 = 509 ⋅11582999.

It can be written as a sum of positive squares in 2 ways, for example, as 1294848256 + 651627729 = 35984^2 + 25527^2 .

It is a cyclic number.

It is not a de Polignac number, because 1946475985 - 2³ = 1946475977 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194647594 + ... + 194647603.

It is an arithmetic number, because the mean of its divisors is an integer number (583942797).

Almost surely, 2^1946475985 is an apocalyptic number.

It is an amenable number.

1946475985 is a deficient number, since it is larger than the sum of its proper divisors (389295203).

1946475985 is an equidigital number, since it uses as much as digits as its factorization.

1946475985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389295202.

The product of its digits is 10886400, while the sum is 58.

The square root of 1946475985 is about 44118.8846753859. The cubic root of 1946475985 is about 1248.5799308004.

The spelling of 1946475985 in words is "one billion, nine hundred forty-six million, four hundred seventy-five thousand, nine hundred eighty-five".