30973217 has 6 divisors (see below), whose sum is σ = 34045074. Its totient is φ = 28157360.

The previous prime is 30973169. The next prime is 30973223. The reversal of 30973217 is 71237903.

It can be written as a sum of positive squares in only one way, i.e., 16654561 + 14318656 = 4081^2 + 3784^2 .

It is not a de Polignac number, because 30973217 - 2²⁴ = 14196001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30973277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127868 + ... + 128109.

It is an arithmetic number, because the mean of its divisors is an integer number (5674179).

Almost surely, 2^30973217 is an apocalyptic number.

It is an amenable number.

30973217 is a deficient number, since it is larger than the sum of its proper divisors (3071857).

30973217 is a wasteful number, since it uses less digits than its factorization.

30973217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255999 (or 255988 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 30973217 is about 5565.3586587030. The cubic root of 30973217 is about 314.0475707877.

The spelling of 30973217 in words is "thirty million, nine hundred seventy-three thousand, two hundred seventeen".