30861043 has 4 divisors (see below), whose sum is σ = 31031728. Its totient is φ = 30690360.

The previous prime is 30861041. The next prime is 30861053. The reversal of 30861043 is 34016803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34016803 = 83 ⋅409841.

It is not a de Polignac number, because 30861043 - 2¹ = 30861041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30860999 and 30861017.

It is not an unprimeable number, because it can be changed into a prime (30861041) 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, 85071 + ... + 85432.

It is an arithmetic number, because the mean of its divisors is an integer number (7757932).

Almost surely, 2^30861043 is an apocalyptic number.

30861043 is a deficient number, since it is larger than the sum of its proper divisors (170685).

30861043 is a wasteful number, since it uses less digits than its factorization.

30861043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170684.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 30861043 is about 5555.2716405231. The cubic root of 30861043 is about 313.6679892317.

Adding to 30861043 its reverse (34016803), we get a palindrome (64877846).

The spelling of 30861043 in words is "thirty million, eight hundred sixty-one thousand, forty-three".