30973 has 4 divisors (see below), whose sum is σ = 31680. Its totient is φ = 30268.

The previous prime is 30971. The next prime is 30977. The reversal of 30973 is 37903.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37903 = 29 ⋅1307.

It is not a de Polignac number, because 30973 - 2¹ = 30971 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283 + ... + 376.

It is an arithmetic number, because the mean of its divisors is an integer number (7920).

2³⁰⁹⁷³ is an apocalyptic number.

It is an amenable number.

30973 is a deficient number, since it is larger than the sum of its proper divisors (707).

30973 is an equidigital number, since it uses as much as digits as its factorization.

30973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 567, while the sum is 22.

The square root of 30973 is about 175.9914770664. The cubic root of 30973 is about 31.4046837375.

The spelling of 30973 in words is "thirty thousand, nine hundred seventy-three".