776963997 has 12 divisors (see below), whose sum is σ = 1126941244. Its totient is φ = 515825280.

The previous prime is 776963987. The next prime is 776964011. The reversal of 776963997 is 799369677.

It can be written as a sum of positive squares in 2 ways, for example, as 235284921 + 541679076 = 15339^2 + 23274^2 .

It is not a de Polignac number, because 776963997 - 2¹⁰ = 776962973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776963987) 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, 176938 + ... + 181275.

Almost surely, 2^776963997 is an apocalyptic number.

It is an amenable number.

776963997 is a deficient number, since it is larger than the sum of its proper divisors (349977247).

776963997 is a wasteful number, since it uses less digits than its factorization.

776963997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358460 (or 358457 counting only the distinct ones).

The product of its digits is 27005076, while the sum is 63.

The square root of 776963997 is about 27874.0739218364. The cubic root of 776963997 is about 919.3205431347.

The spelling of 776963997 in words is "seven hundred seventy-six million, nine hundred sixty-three thousand, nine hundred ninety-seven".