2978845773 has 4 divisors (see below), whose sum is σ = 3971794368. Its totient is φ = 1985897180.

The previous prime is 2978845763. The next prime is 2978845787. The reversal of 2978845773 is 3775488792.

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 a de Polignac number, because none of the positive numbers 2^k-2978845773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978845733) 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, 496474293 + ... + 496474298.

It is an arithmetic number, because the mean of its divisors is an integer number (992948592).

Almost surely, 2^2978845773 is an apocalyptic number.

It is an amenable number.

2978845773 is a deficient number, since it is larger than the sum of its proper divisors (992948595).

2978845773 is an equidigital number, since it uses as much as digits as its factorization.

2978845773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992948594.

The product of its digits is 23708160, while the sum is 60.

The square root of 2978845773 is about 54578.8033305971. The cubic root of 2978845773 is about 1438.8516070716.

The spelling of 2978845773 in words is "two billion, nine hundred seventy-eight million, eight hundred forty-five thousand, seven hundred seventy-three".