30082139 has 4 divisors (see below), whose sum is σ = 30266856. Its totient is φ = 29897424.

The previous prime is 30082133. The next prime is 30082159. The reversal of 30082139 is 93128003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93128003 = 233 ⋅399691.

It is a cyclic number.

It is not a de Polignac number, because 30082139 - 2⁴ = 30082123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30082133) 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, 92114 + ... + 92439.

It is an arithmetic number, because the mean of its divisors is an integer number (7566714).

Almost surely, 2^30082139 is an apocalyptic number.

30082139 is a deficient number, since it is larger than the sum of its proper divisors (184717).

30082139 is a wasteful number, since it uses less digits than its factorization.

30082139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184716.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 30082139 is about 5484.7186801148. The cubic root of 30082139 is about 311.0065754754.

The spelling of 30082139 in words is "thirty million, eighty-two thousand, one hundred thirty-nine".