2778873473 has 4 divisors (see below), whose sum is σ = 2818012608. Its totient is φ = 2739734340.

The previous prime is 2778873451. The next prime is 2778873589. The reversal of 2778873473 is 3743788772.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2778873473 - 2¹⁰ = 2778872449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778873403) 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, 19569461 + ... + 19569602.

It is an arithmetic number, because the mean of its divisors is an integer number (704503152).

Almost surely, 2^2778873473 is an apocalyptic number.

It is an amenable number.

2778873473 is a deficient number, since it is larger than the sum of its proper divisors (39139135).

2778873473 is an equidigital number, since it uses as much as digits as its factorization.

2778873473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39139134.

The product of its digits is 11063808, while the sum is 56.

The square root of 2778873473 is about 52715.0213222000. The cubic root of 2778873473 is about 1405.9059135679.

The spelling of 2778873473 in words is "two billion, seven hundred seventy-eight million, eight hundred seventy-three thousand, four hundred seventy-three".