1278982983 has 4 divisors (see below), whose sum is σ = 1705310648. Its totient is φ = 852655320.

The previous prime is 1278982961. The next prime is 1278982997. The reversal of 1278982983 is 3892898721.

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

It is not a de Polignac number, because 1278982983 - 2¹⁴ = 1278966599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278982933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213163828 + ... + 213163833.

It is an arithmetic number, because the mean of its divisors is an integer number (426327662).

Almost surely, 2^1278982983 is an apocalyptic number.

1278982983 is a deficient number, since it is larger than the sum of its proper divisors (426327665).

1278982983 is an equidigital number, since it uses as much as digits as its factorization.

1278982983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426327664.

The product of its digits is 3483648, while the sum is 57.

The square root of 1278982983 is about 35762.8715709463. The cubic root of 1278982983 is about 1085.4794070206.

The spelling of 1278982983 in words is "one billion, two hundred seventy-eight million, nine hundred eighty-two thousand, nine hundred eighty-three".