1963979 has 4 divisors (see below), whose sum is σ = 1970976. Its totient is φ = 1956984.

The previous prime is 1963921. The next prime is 1963981. The reversal of 1963979 is 9793691.

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: 9793691 = 131 ⋅74761.

It is a cyclic number.

It is not a de Polignac number, because 1963979 - 2¹² = 1959883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1963999) 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, 3059 + ... + 3644.

It is an arithmetic number, because the mean of its divisors is an integer number (492744).

2^1963979 is an apocalyptic number.

1963979 is a deficient number, since it is larger than the sum of its proper divisors (6997).

1963979 is an equidigital number, since it uses as much as digits as its factorization.

1963979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996.

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

The square root of 1963979 is about 1401.4203509297. The cubic root of 1963979 is about 125.2311243887.

The spelling of 1963979 in words is "one million, nine hundred sixty-three thousand, nine hundred seventy-nine".