1982744194 has 4 divisors (see below), whose sum is σ = 2974116294. Its totient is φ = 991372096.

The previous prime is 1982744191. The next prime is 1982744201. The reversal of 1982744194 is 4914472891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4914472891 = 47 ⋅104563253.

It can be written as a sum of positive squares in only one way, i.e., 1800898969 + 181845225 = 42437^2 + 13485^2 .

It is a super-3 number, since 3×1982744194³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1982744191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495686047 + ... + 495686050.

Almost surely, 2^1982744194 is an apocalyptic number.

1982744194 is a deficient number, since it is larger than the sum of its proper divisors (991372100).

1982744194 is an equidigital number, since it uses as much as digits as its factorization.

1982744194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991372099.

The product of its digits is 580608, while the sum is 49.

The square root of 1982744194 is about 44528.0158327316. The cubic root of 1982744194 is about 1256.2870864063.

The spelling of 1982744194 in words is "one billion, nine hundred eighty-two million, seven hundred forty-four thousand, one hundred ninety-four".