705387 has 8 divisors (see below), whose sum is σ = 981504. Its totient is φ = 449768.

The previous prime is 705317. The next prime is 705389. The reversal of 705387 is 783507.

705387 = 164² + 165² + ... + 186².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 705387 - 2⁷ = 705259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (705389) 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 in 7 ways as a sum of consecutive naturals, for example, 5043 + ... + 5180.

It is an arithmetic number, because the mean of its divisors is an integer number (122688).

2⁷⁰⁵³⁸⁷ is an apocalyptic number.

705387 is a deficient number, since it is larger than the sum of its proper divisors (276117).

705387 is a wasteful number, since it uses less digits than its factorization.

705387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 705387 is about 839.8732047160. The cubic root of 705387 is about 89.0175868961.

It can be divided in two parts, 7053 and 87, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 705387 in words is "seven hundred five thousand, three hundred eighty-seven".