813921974 has 16 divisors (see below), whose sum is σ = 1250410128. Its totient is φ = 397135872.

The previous prime is 813921973. The next prime is 813921989. The reversal of 813921974 is 479129318.

813921974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813921973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107894 + ... + 115190.

It is an arithmetic number, because the mean of its divisors is an integer number (78150633).

Almost surely, 2^813921974 is an apocalyptic number.

813921974 is a deficient number, since it is larger than the sum of its proper divisors (436488154).

813921974 is a wasteful number, since it uses less digits than its factorization.

813921974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8639.

The product of its digits is 108864, while the sum is 44.

The square root of 813921974 is about 28529.3177976621. The cubic root of 813921974 is about 933.6718343889.

The spelling of 813921974 in words is "eight hundred thirteen million, nine hundred twenty-one thousand, nine hundred seventy-four".