30639171 has 4 divisors (see below), whose sum is σ = 40852232. Its totient is φ = 20426112.

The previous prime is 30639163. The next prime is 30639173. The reversal of 30639171 is 17193603.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30639171 - 2³ = 30639163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30639173) 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, 5106526 + ... + 5106531.

It is an arithmetic number, because the mean of its divisors is an integer number (10213058).

Almost surely, 2^30639171 is an apocalyptic number.

30639171 is a deficient number, since it is larger than the sum of its proper divisors (10213061).

30639171 is a wasteful number, since it uses less digits than its factorization.

30639171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10213060.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 30639171 is about 5535.2661182639. The cubic root of 30639171 is about 312.9144870119.

The spelling of 30639171 in words is "thirty million, six hundred thirty-nine thousand, one hundred seventy-one".