30981359 has 4 divisors (see below), whose sum is σ = 31160616. Its totient is φ = 30802104.

The previous prime is 30981337. The next prime is 30981373. The reversal of 30981359 is 95318903.

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

It is a cyclic number.

It is not a de Polignac number, because 30981359 - 2⁸ = 30981103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30981329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89369 + ... + 89714.

It is an arithmetic number, because the mean of its divisors is an integer number (7790154).

Almost surely, 2^30981359 is an apocalyptic number.

30981359 is a deficient number, since it is larger than the sum of its proper divisors (179257).

30981359 is a wasteful number, since it uses less digits than its factorization.

30981359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179256.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 30981359 is about 5566.0900998816. The cubic root of 30981359 is about 314.0750865099.

The spelling of 30981359 in words is "thirty million, nine hundred eighty-one thousand, three hundred fifty-nine".