1979963 has 4 divisors (see below), whose sum is σ = 1985088. Its totient is φ = 1974840.

The previous prime is 1979947. The next prime is 1979993. The reversal of 1979963 is 3699791.

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: 3699791 = 29 ⋅127579.

It is a cyclic number.

It is not a de Polignac number, because 1979963 - 2⁴ = 1979947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979993) 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 in 3 ways as a sum of consecutive naturals, for example, 1931 + ... + 2772.

It is an arithmetic number, because the mean of its divisors is an integer number (496272).

2^1979963 is an apocalyptic number.

1979963 is a deficient number, since it is larger than the sum of its proper divisors (5125).

1979963 is an equidigital number, since it uses as much as digits as its factorization.

1979963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5124.

The product of its digits is 91854, while the sum is 44.

The square root of 1979963 is about 1407.1115805081. Note that the first 3 decimals coincide. The cubic root of 1979963 is about 125.5699413850.

The spelling of 1979963 in words is "one million, nine hundred seventy-nine thousand, nine hundred sixty-three".