813749634 has 24 divisors (see below), whose sum is σ = 1800639360. Its totient is φ = 265478328.

The previous prime is 813749617. The next prime is 813749647. The reversal of 813749634 is 436947318.

813749634 is a `hidden beast` number, since 8 + 1 + 3 + 7 + 4 + 9 + 634 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 813749634.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480094 + ... + 481785.

It is an arithmetic number, because the mean of its divisors is an integer number (75026640).

Almost surely, 2^813749634 is an apocalyptic number.

813749634 is an abundant number, since it is smaller than the sum of its proper divisors (986889726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813749634 is a wasteful number, since it uses less digits than its factorization.

813749634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961934 (or 961931 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 813749634 is about 28526.2972360592. The cubic root of 813749634 is about 933.6059311175.

The spelling of 813749634 in words is "eight hundred thirteen million, seven hundred forty-nine thousand, six hundred thirty-four".