813397585 has 32 divisors (see below), whose sum is σ = 1310545152. Its totient is φ = 468046080.

The previous prime is 813397583. The next prime is 813397601. The reversal of 813397585 is 585793318.

It is not a de Polignac number, because 813397585 - 2¹ = 813397583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813397583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76254 + ... + 86263.

It is an arithmetic number, because the mean of its divisors is an integer number (40954536).

Almost surely, 2^813397585 is an apocalyptic number.

It is an amenable number.

813397585 is a deficient number, since it is larger than the sum of its proper divisors (497147567).

813397585 is a wasteful number, since it uses less digits than its factorization.

813397585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162553.

The product of its digits is 907200, while the sum is 49.

The square root of 813397585 is about 28520.1259639575. The cubic root of 813397585 is about 933.4712777262.

The spelling of 813397585 in words is "eight hundred thirteen million, three hundred ninety-seven thousand, five hundred eighty-five".