864048139 has 2 divisors, whose sum is σ = 864048140. Its totient is φ = 864048138.

The previous prime is 864048121. The next prime is 864048181. The reversal of 864048139 is 931840468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864048139 - 2²¹ = 861950987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864048095 and 864048104.

It is not a weakly prime, because it can be changed into another prime (864048109) 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, 432024069 + 432024070.

It is an arithmetic number, because the mean of its divisors is an integer number (432024070).

Almost surely, 2^864048139 is an apocalyptic number.

864048139 is a deficient number, since it is larger than the sum of its proper divisors (1).

864048139 is an equidigital number, since it uses as much as digits as its factorization.

864048139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 864048139 is about 29394.6957630114. The cubic root of 864048139 is about 952.4583197180.

The spelling of 864048139 in words is "eight hundred sixty-four million, forty-eight thousand, one hundred thirty-nine".