1705749139 has 2 divisors, whose sum is σ = 1705749140. Its totient is φ = 1705749138.

The previous prime is 1705749127. The next prime is 1705749151. The reversal of 1705749139 is 9319475071.

It is a balanced prime because it is at equal distance from previous prime (1705749127) and next prime (1705749151).

It is a cyclic number.

It is not a de Polignac number, because 1705749139 - 2¹⁵ = 1705716371 is a prime.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852874569 + 852874570.

It is an arithmetic number, because the mean of its divisors is an integer number (852874570).

Almost surely, 2^1705749139 is an apocalyptic number.

1705749139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705749139 is an equidigital number, since it uses as much as digits as its factorization.

1705749139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 46.

The square root of 1705749139 is about 41300.7159623172. The cubic root of 1705749139 is about 1194.8270704404.

The spelling of 1705749139 in words is "one billion, seven hundred five million, seven hundred forty-nine thousand, one hundred thirty-nine".