30186139 has 2 divisors, whose sum is σ = 30186140. Its totient is φ = 30186138.

The previous prime is 30186131. The next prime is 30186161. The reversal of 30186139 is 93168103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30186139 - 2³ = 30186131 is a prime.

It is a super-2 number, since 2×30186139² = 1822405975454642, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30186139.

It is not a weakly prime, because it can be changed into another prime (30186131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15093069 + 15093070.

It is an arithmetic number, because the mean of its divisors is an integer number (15093070).

Almost surely, 2^30186139 is an apocalyptic number.

30186139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30186139 is an equidigital number, since it uses as much as digits as its factorization.

30186139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 30186139 is about 5494.1913872744. The cubic root of 30186139 is about 311.3645673195.

The spelling of 30186139 in words is "thirty million, one hundred eighty-six thousand, one hundred thirty-nine".