213794685 has 24 divisors (see below), whose sum is σ = 399084504. Its totient is φ = 105252480.

The previous prime is 213794677. The next prime is 213794687. The reversal of 213794685 is 586497312.

It can be written as a sum of positive squares in 4 ways, for example, as 79524 + 213715161 = 282^2 + 14619^2 .

It is not a de Polignac number, because 213794685 - 2³ = 213794677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 213794685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213794687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182146 + ... + 183315.

It is an arithmetic number, because the mean of its divisors is an integer number (16628521).

Almost surely, 2^213794685 is an apocalyptic number.

It is an amenable number.

213794685 is a deficient number, since it is larger than the sum of its proper divisors (185289819).

213794685 is a wasteful number, since it uses less digits than its factorization.

213794685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365485 (or 365482 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 213794685 is about 14621.7196321089. The cubic root of 213794685 is about 597.9510526560.

The spelling of 213794685 in words is "two hundred thirteen million, seven hundred ninety-four thousand, six hundred eighty-five".