30968953 has 4 divisors (see below), whose sum is σ = 31007140. Its totient is φ = 30930768.

The previous prime is 30968947. The next prime is 30968957. The reversal of 30968953 is 35986903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12194064 + 18774889 = 3492^2 + 4333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30968953 is a prime.

It is a super-3 number, since 3×30968953³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30968957) 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, 17850 + ... + 19507.

It is an arithmetic number, because the mean of its divisors is an integer number (7751785).

Almost surely, 2^30968953 is an apocalyptic number.

It is an amenable number.

30968953 is a deficient number, since it is larger than the sum of its proper divisors (38187).

30968953 is an equidigital number, since it uses as much as digits as its factorization.

30968953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38186.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 30968953 is about 5564.9755614917. The cubic root of 30968953 is about 314.0331587631.

The spelling of 30968953 in words is "thirty million, nine hundred sixty-eight thousand, nine hundred fifty-three".