1263804879 has 4 divisors (see below), whose sum is σ = 1685073176. Its totient is φ = 842536584.

The previous prime is 1263804847. The next prime is 1263804887. The reversal of 1263804879 is 9784083621.

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

It is not a de Polignac number, because 1263804879 - 2⁵ = 1263804847 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 (1263804889) 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, 210634144 + ... + 210634149.

It is an arithmetic number, because the mean of its divisors is an integer number (421268294).

Almost surely, 2^1263804879 is an apocalyptic number.

1263804879 is a deficient number, since it is larger than the sum of its proper divisors (421268297).

1263804879 is an equidigital number, since it uses as much as digits as its factorization.

1263804879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421268296.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1263804879 is about 35550.0334598999. The cubic root of 1263804879 is about 1081.1683968664.

The spelling of 1263804879 in words is "one billion, two hundred sixty-three million, eight hundred four thousand, eight hundred seventy-nine".