30532139 has 4 divisors (see below), whose sum is σ = 33307800. Its totient is φ = 27756480.

The previous prime is 30532127. The next prime is 30532171. The reversal of 30532139 is 93123503.

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

It is a cyclic number.

It is not a de Polignac number, because 30532139 - 2¹⁶ = 30466603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30532189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387814 + ... + 1387835.

It is an arithmetic number, because the mean of its divisors is an integer number (8326950).

Almost surely, 2^30532139 is an apocalyptic number.

30532139 is a deficient number, since it is larger than the sum of its proper divisors (2775661).

30532139 is a wasteful number, since it uses less digits than its factorization.

30532139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775660.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 30532139 is about 5525.5894708167. The cubic root of 30532139 is about 312.5496932175.

The spelling of 30532139 in words is "thirty million, five hundred thirty-two thousand, one hundred thirty-nine".