30986143 has 4 divisors (see below), whose sum is σ = 31985728. Its totient is φ = 29986560.

The previous prime is 30986117. The next prime is 30986147. The reversal of 30986143 is 34168903.

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 30986143 - 2¹³ = 30977951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30986099 and 30986108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30986147) 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, 499746 + ... + 499807.

It is an arithmetic number, because the mean of its divisors is an integer number (7996432).

Almost surely, 2^30986143 is an apocalyptic number.

30986143 is a deficient number, since it is larger than the sum of its proper divisors (999585).

30986143 is an equidigital number, since it uses as much as digits as its factorization.

30986143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999584.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 30986143 is about 5566.5198284027. The cubic root of 30986143 is about 314.0912516915.

The spelling of 30986143 in words is "thirty million, nine hundred eighty-six thousand, one hundred forty-three".