773897977 has 4 divisors (see below), whose sum is σ = 773962740. Its totient is φ = 773833216.

The previous prime is 773897963. The next prime is 773897989. The reversal of 773897977 is 779798377.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 779798377 = 5381 ⋅144917.

It can be written as a sum of positive squares in 2 ways, for example, as 160047801 + 613850176 = 12651^2 + 24776^2 .

It is a cyclic number.

It is not a de Polignac number, because 773897977 - 2⁷ = 773897849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (773897947) 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 in 3 ways as a sum of consecutive naturals, for example, 8668 + ... + 40285.

It is an arithmetic number, because the mean of its divisors is an integer number (193490685).

Almost surely, 2^773897977 is an apocalyptic number.

It is an amenable number.

773897977 is a deficient number, since it is larger than the sum of its proper divisors (64763).

773897977 is a wasteful number, since it uses less digits than its factorization.

773897977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64762.

The product of its digits is 32672808, while the sum is 64.

The square root of 773897977 is about 27819.0218555578. The cubic root of 773897977 is about 918.1096886856.

The spelling of 773897977 in words is "seven hundred seventy-three million, eight hundred ninety-seven thousand, nine hundred seventy-seven".