30651139 has 2 divisors, whose sum is σ = 30651140. Its totient is φ = 30651138.

The previous prime is 30651121. The next prime is 30651143. The reversal of 30651139 is 93115603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30651139 - 2⁷ = 30651011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30651109) 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, 15325569 + 15325570.

It is an arithmetic number, because the mean of its divisors is an integer number (15325570).

Almost surely, 2^30651139 is an apocalyptic number.

30651139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30651139 is an equidigital number, since it uses as much as digits as its factorization.

30651139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 30651139 is about 5536.3470808828. The cubic root of 30651139 is about 312.9552243313.

The spelling of 30651139 in words is "thirty million, six hundred fifty-one thousand, one hundred thirty-nine".