30671139 has 4 divisors (see below), whose sum is σ = 40894856. Its totient is φ = 20447424.

The previous prime is 30671117. The next prime is 30671143. The reversal of 30671139 is 93117603.

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

It is not a de Polignac number, because 30671139 - 2²⁰ = 29622563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30671189) 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, 5111854 + ... + 5111859.

It is an arithmetic number, because the mean of its divisors is an integer number (10223714).

Almost surely, 2^30671139 is an apocalyptic number.

30671139 is a deficient number, since it is larger than the sum of its proper divisors (10223717).

30671139 is a wasteful number, since it uses less digits than its factorization.

30671139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10223716.

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

The square root of 30671139 is about 5538.1530314718. The cubic root of 30671139 is about 313.0232777416.

The spelling of 30671139 in words is "thirty million, six hundred seventy-one thousand, one hundred thirty-nine".