813774047 has 4 divisors (see below), whose sum is σ = 856604280. Its totient is φ = 770943816.

The previous prime is 813774029. The next prime is 813774061. The reversal of 813774047 is 740477318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 813774047 - 2⁸ = 813773791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813773995 and 813774013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813774007) 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, 21415088 + ... + 21415125.

It is an arithmetic number, because the mean of its divisors is an integer number (214151070).

Almost surely, 2^813774047 is an apocalyptic number.

813774047 is a deficient number, since it is larger than the sum of its proper divisors (42830233).

813774047 is a wasteful number, since it uses less digits than its factorization.

813774047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42830232.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 813774047 is about 28526.7251362648. The cubic root of 813774047 is about 933.6152672789.

The spelling of 813774047 in words is "eight hundred thirteen million, seven hundred seventy-four thousand, forty-seven".