813697845 has 16 divisors (see below), whose sum is σ = 1302962112. Its totient is φ = 433623680.

The previous prime is 813697813. The next prime is 813697891. The reversal of 813697845 is 548796318.

It is not a de Polignac number, because 813697845 - 2⁵ = 813697813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1896 + ... + 40385.

It is an arithmetic number, because the mean of its divisors is an integer number (81435132).

Almost surely, 2^813697845 is an apocalyptic number.

It is an amenable number.

813697845 is a deficient number, since it is larger than the sum of its proper divisors (489264267).

813697845 is a wasteful number, since it uses less digits than its factorization.

813697845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43572.

The product of its digits is 1451520, while the sum is 51.

The square root of 813697845 is about 28525.3894802507. The cubic root of 813697845 is about 933.5861250489.

The spelling of 813697845 in words is "eight hundred thirteen million, six hundred ninety-seven thousand, eight hundred forty-five".