30972043 has 4 divisors (see below), whose sum is σ = 31005040. Its totient is φ = 30939048.

The previous prime is 30972041. The next prime is 30972047. The reversal of 30972043 is 34027903.

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 30972043 - 2¹ = 30972041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30972041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15048 + ... + 16981.

It is an arithmetic number, because the mean of its divisors is an integer number (7751260).

Almost surely, 2^30972043 is an apocalyptic number.

30972043 is a deficient number, since it is larger than the sum of its proper divisors (32997).

30972043 is an equidigital number, since it uses as much as digits as its factorization.

30972043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32996.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 30972043 is about 5565.2531838183. The cubic root of 30972043 is about 314.0436028810.

Adding to 30972043 its reverse (34027903), we get a palindrome (64999946).

The spelling of 30972043 in words is "thirty million, nine hundred seventy-two thousand, forty-three".