1676978773 has 2 divisors, whose sum is σ = 1676978774. Its totient is φ = 1676978772.

The previous prime is 1676978747. The next prime is 1676978789. The reversal of 1676978773 is 3778796761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1504896849 + 172081924 = 38793^2 + 13118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1676978773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1676978473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838489386 + 838489387.

It is an arithmetic number, because the mean of its divisors is an integer number (838489387).

Almost surely, 2^1676978773 is an apocalyptic number.

It is an amenable number.

1676978773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1676978773 is an equidigital number, since it uses as much as digits as its factorization.

1676978773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18670176, while the sum is 61.

The square root of 1676978773 is about 40950.9312836717. The cubic root of 1676978773 is about 1188.0713463804.

The spelling of 1676978773 in words is "one billion, six hundred seventy-six million, nine hundred seventy-eight thousand, seven hundred seventy-three".