30102139 has 2 divisors, whose sum is σ = 30102140. Its totient is φ = 30102138.

The previous prime is 30102131. The next prime is 30102151. The reversal of 30102139 is 93120103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30102139 - 2³ = 30102131 is a prime.

It is a super-2 number, since 2×30102139² = 1812277544750642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30102131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15051069 + 15051070.

It is an arithmetic number, because the mean of its divisors is an integer number (15051070).

Almost surely, 2^30102139 is an apocalyptic number.

30102139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30102139 is an equidigital number, since it uses as much as digits as its factorization.

30102139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 30102139 is about 5486.5416247396. The cubic root of 30102139 is about 311.0754840675.

The spelling of 30102139 in words is "thirty million, one hundred two thousand, one hundred thirty-nine".