1979634263 has 4 divisors (see below), whose sum is σ = 2083825560. Its totient is φ = 1875442968.

The previous prime is 1979634259. The next prime is 1979634269. The reversal of 1979634263 is 3624369791.

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 1979634263 - 2² = 1979634259 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 (1979634269) 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, 52095620 + ... + 52095657.

It is an arithmetic number, because the mean of its divisors is an integer number (520956390).

Almost surely, 2^1979634263 is an apocalyptic number.

1979634263 is a deficient number, since it is larger than the sum of its proper divisors (104191297).

1979634263 is a wasteful number, since it uses less digits than its factorization.

1979634263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104191296.

The product of its digits is 1469664, while the sum is 50.

The square root of 1979634263 is about 44493.0810688583. The cubic root of 1979634263 is about 1255.6299146207.

The spelling of 1979634263 in words is "one billion, nine hundred seventy-nine million, six hundred thirty-four thousand, two hundred sixty-three".