30682813 has 16 divisors (see below), whose sum is σ = 35997696. Its totient is φ = 25608960.

The previous prime is 30682789. The next prime is 30682823. The reversal of 30682813 is 31828603.

It is a cyclic number.

It is not a de Polignac number, because 30682813 - 2¹³ = 30674621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30682823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70645 + ... + 71077.

It is an arithmetic number, because the mean of its divisors is an integer number (2249856).

Almost surely, 2^30682813 is an apocalyptic number.

It is an amenable number.

30682813 is a deficient number, since it is larger than the sum of its proper divisors (5314883).

30682813 is a wasteful number, since it uses less digits than its factorization.

30682813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 30682813 is about 5539.2068926878. The cubic root of 30682813 is about 313.0629868442.

The spelling of 30682813 in words is "thirty million, six hundred eighty-two thousand, eight hundred thirteen".