684456802 has 4 divisors (see below), whose sum is σ = 1026685206. Its totient is φ = 342228400.

The previous prime is 684456769. The next prime is 684456809. The reversal of 684456802 is 208654486.

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., 588984361 + 95472441 = 24269^2 + 9771^2 .

It is a super-2 number, since 2×684456802² = 936962227608134408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (684456809) by changing a digit.

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, 171114199 + ... + 171114202.

Almost surely, 2^684456802 is an apocalyptic number.

684456802 is a deficient number, since it is larger than the sum of its proper divisors (342228404).

684456802 is a wasteful number, since it uses less digits than its factorization.

684456802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342228403.

The product of its (nonzero) digits is 368640, while the sum is 43.

The square root of 684456802 is about 26162.1253341543. The cubic root of 684456802 is about 881.2829092752.

The spelling of 684456802 in words is "six hundred eighty-four million, four hundred fifty-six thousand, eight hundred two".