705278345 has 8 divisors (see below), whose sum is σ = 847824840. Its totient is φ = 563228800.

The previous prime is 705278317. The next prime is 705278359. The reversal of 705278345 is 543872507.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 705274249 = 64^2 + 26557^2 .

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

It is not a de Polignac number, because 705278345 - 2⁶ = 705278281 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121106 + ... + 126795.

It is an arithmetic number, because the mean of its divisors is an integer number (105978105).

Almost surely, 2^705278345 is an apocalyptic number.

It is an amenable number.

705278345 is a deficient number, since it is larger than the sum of its proper divisors (142546495).

705278345 is a wasteful number, since it uses less digits than its factorization.

705278345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248475.

The product of its (nonzero) digits is 235200, while the sum is 41.

The square root of 705278345 is about 26557.0771170323. The cubic root of 705278345 is about 890.1301602338.

The spelling of 705278345 in words is "seven hundred five million, two hundred seventy-eight thousand, three hundred forty-five".