777061993 has 8 divisors (see below), whose sum is σ = 823015080. Its totient is φ = 731136000.

The previous prime is 777061949. The next prime is 777062017. The reversal of 777061993 is 399160777.

It can be written as a sum of positive squares in 4 ways, for example, as 50651689 + 726410304 = 7117^2 + 26952^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 777061993 - 2¹³ = 777053801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (777061193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107493 + ... + 114493.

It is an arithmetic number, because the mean of its divisors is an integer number (102876885).

Almost surely, 2^777061993 is an apocalyptic number.

It is an amenable number.

777061993 is a deficient number, since it is larger than the sum of its proper divisors (45953087).

777061993 is a wasteful number, since it uses less digits than its factorization.

777061993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13547.

The product of its (nonzero) digits is 500094, while the sum is 49.

The square root of 777061993 is about 27875.8317005968. The cubic root of 777061993 is about 919.3591918361.

The spelling of 777061993 in words is "seven hundred seventy-seven million, sixty-one thousand, nine hundred ninety-three".