1978694483 has 4 divisors (see below), whose sum is σ = 1987186968. Its totient is φ = 1970202000.

The previous prime is 1978694467. The next prime is 1978694491. The reversal of 1978694483 is 3844968791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1978694483 - 2⁴ = 1978694467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1978694453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4245893 + ... + 4246358.

It is an arithmetic number, because the mean of its divisors is an integer number (496796742).

Almost surely, 2^1978694483 is an apocalyptic number.

1978694483 is a deficient number, since it is larger than the sum of its proper divisors (8492485).

1978694483 is an equidigital number, since it uses as much as digits as its factorization.

1978694483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492484.

The product of its digits is 10450944, while the sum is 59.

The square root of 1978694483 is about 44482.5188472955. The cubic root of 1978694483 is about 1255.4311905972.

The spelling of 1978694483 in words is "one billion, nine hundred seventy-eight million, six hundred ninety-four thousand, four hundred eighty-three".