704978 has 4 divisors (see below), whose sum is σ = 1057470. Its totient is φ = 352488.

The previous prime is 704947. The next prime is 704983. The reversal of 704978 is 879407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879407 = 101 ⋅8707.

It can be written as a sum of positive squares in only one way, i.e., 405769 + 299209 = 637^2 + 547^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176243 + ... + 176246.

2⁷⁰⁴⁹⁷⁸ is an apocalyptic number.

704978 is a deficient number, since it is larger than the sum of its proper divisors (352492).

704978 is a wasteful number, since it uses less digits than its factorization.

704978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352491.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 704978 is about 839.6296802758. The cubic root of 704978 is about 89.0003787384. Note that the first 3 decimals are identical.

The spelling of 704978 in words is "seven hundred four thousand, nine hundred seventy-eight".