813939106 has 8 divisors (see below), whose sum is σ = 1221065964. Its totient is φ = 406917120.

The previous prime is 813939059. The next prime is 813939109. The reversal of 813939106 is 601939318.

It can be written as a sum of positive squares in 2 ways, for example, as 807980625 + 5958481 = 28425^2 + 2441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (813939109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2535 + ... + 40426.

Almost surely, 2^813939106 is an apocalyptic number.

813939106 is a deficient number, since it is larger than the sum of its proper divisors (407126858).

813939106 is a wasteful number, since it uses less digits than its factorization.

813939106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52436.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 813939106 is about 28529.6180486175. The cubic root of 813939106 is about 933.6783852026.

The spelling of 813939106 in words is "eight hundred thirteen million, nine hundred thirty-nine thousand, one hundred six".