238032139 has 2 divisors, whose sum is σ = 238032140. Its totient is φ = 238032138.

The previous prime is 238032121. The next prime is 238032217. The reversal of 238032139 is 931230832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238032139 - 2⁹ = 238031627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238032139.

It is not a weakly prime, because it can be changed into another prime (238032239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119016069 + 119016070.

It is an arithmetic number, because the mean of its divisors is an integer number (119016070).

Almost surely, 2^238032139 is an apocalyptic number.

238032139 is a deficient number, since it is larger than the sum of its proper divisors (1).

238032139 is an equidigital number, since it uses as much as digits as its factorization.

238032139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 238032139 is about 15428.2902163526. The cubic root of 238032139 is about 619.7433372251.

The spelling of 238032139 in words is "two hundred thirty-eight million, thirty-two thousand, one hundred thirty-nine".