684834946 has 4 divisors (see below), whose sum is σ = 1027252422. Its totient is φ = 342417472.

The previous prime is 684834937. The next prime is 684834967. The reversal of 684834946 is 649438486.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 667653921 + 17181025 = 25839^2 + 4145^2 .

It is a junction number, because it is equal to n+sod(n) for n = 684834893 and 684834902.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171208735 + ... + 171208738.

Almost surely, 2^684834946 is an apocalyptic number.

684834946 is a deficient number, since it is larger than the sum of its proper divisors (342417476).

684834946 is a wasteful number, since it uses less digits than its factorization.

684834946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342417475.

The product of its digits is 3981312, while the sum is 52.

The square root of 684834946 is about 26169.3512720511. The cubic root of 684834946 is about 881.4451744425.

The spelling of 684834946 in words is "six hundred eighty-four million, eight hundred thirty-four thousand, nine hundred forty-six".