30450139 has 2 divisors, whose sum is σ = 30450140. Its totient is φ = 30450138.

The previous prime is 30450089. The next prime is 30450151. The reversal of 30450139 is 93105403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30450139 - 2⁷ = 30450011 is a prime.

It is not a weakly prime, because it can be changed into another prime (30450169) 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 as a sum of consecutive naturals, namely, 15225069 + 15225070.

It is an arithmetic number, because the mean of its divisors is an integer number (15225070).

Almost surely, 2^30450139 is an apocalyptic number.

30450139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30450139 is an equidigital number, since it uses as much as digits as its factorization.

30450139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 30450139 is about 5518.1644593107. The cubic root of 30450139 is about 312.2696380151.

The spelling of 30450139 in words is "thirty million, four hundred fifty thousand, one hundred thirty-nine".