1963278879 has 4 divisors (see below), whose sum is σ = 2617705176. Its totient is φ = 1308852584.

The previous prime is 1963278871. The next prime is 1963278893. The reversal of 1963278879 is 9788723691.

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 1963278879 - 2³ = 1963278871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963278871) 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, 327213144 + ... + 327213149.

It is an arithmetic number, because the mean of its divisors is an integer number (654426294).

Almost surely, 2^1963278879 is an apocalyptic number.

1963278879 is a deficient number, since it is larger than the sum of its proper divisors (654426297).

1963278879 is an equidigital number, since it uses as much as digits as its factorization.

1963278879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654426296.

The product of its digits is 9144576, while the sum is 60.

The square root of 1963278879 is about 44308.9029315780. The cubic root of 1963278879 is about 1252.1624178554.

The spelling of 1963278879 in words is "one billion, nine hundred sixty-three million, two hundred seventy-eight thousand, eight hundred seventy-nine".