776690109 has 12 divisors (see below), whose sum is σ = 1208184796. Its totient is φ = 477963072.

The previous prime is 776690099. The next prime is 776690111. The reversal of 776690109 is 901096677.

It can be written as a sum of positive squares in 2 ways, for example, as 523402884 + 253287225 = 22878^2 + 15915^2 .

It is not a de Polignac number, because 776690109 - 2⁹ = 776689597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776690119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3319072 + ... + 3319305.

Almost surely, 2^776690109 is an apocalyptic number.

It is an amenable number.

776690109 is a deficient number, since it is larger than the sum of its proper divisors (431494687).

776690109 is a wasteful number, since it uses less digits than its factorization.

776690109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6638396 (or 6638393 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 776690109 is about 27869.1605363348. The cubic root of 776690109 is about 919.2125070446.

The spelling of 776690109 in words is "seven hundred seventy-six million, six hundred ninety thousand, one hundred nine".