768139 has 2 divisors, whose sum is σ = 768140. Its totient is φ = 768138.

The previous prime is 768133. The next prime is 768161. The reversal of 768139 is 931867.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 768139 - 2⁵ = 768107 is a prime.

768139 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (768133) 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, 384069 + 384070.

It is an arithmetic number, because the mean of its divisors is an integer number (384070).

2⁷⁶⁸¹³⁹ is an apocalyptic number.

768139 is a deficient number, since it is larger than the sum of its proper divisors (1).

768139 is an equidigital number, since it uses as much as digits as its factorization.

768139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 768139 is about 876.4353940822. The cubic root of 768139 is about 91.5826639071.

The spelling of 768139 in words is "seven hundred sixty-eight thousand, one hundred thirty-nine".