776397473 has 4 divisors (see below), whose sum is σ = 776933268. Its totient is φ = 775861680.

The previous prime is 776397451. The next prime is 776397481. The reversal of 776397473 is 374793677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374793677 = 19 ⋅19725983.

It can be written as a sum of positive squares in 2 ways, for example, as 606538384 + 169859089 = 24628^2 + 13033^2 .

It is a cyclic number.

It is not a de Polignac number, because 776397473 - 2⁸ = 776397217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (776397073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265718 + ... + 268623.

It is an arithmetic number, because the mean of its divisors is an integer number (194233317).

Almost surely, 2^776397473 is an apocalyptic number.

It is an amenable number.

776397473 is a deficient number, since it is larger than the sum of its proper divisors (535795).

776397473 is a wasteful number, since it uses less digits than its factorization.

776397473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535794.

The product of its digits is 4667544, while the sum is 53.

The square root of 776397473 is about 27863.9098656308. The cubic root of 776397473 is about 919.0970476705.

The spelling of 776397473 in words is "seven hundred seventy-six million, three hundred ninety-seven thousand, four hundred seventy-three".