684961443 has 12 divisors (see below), whose sum is σ = 993043168. Its totient is φ = 454954320.

The previous prime is 684961369. The next prime is 684961447. The reversal of 684961443 is 344169486.

It is not a de Polignac number, because 684961443 - 2⁸ = 684961187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684961447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137980 + ... + 142857.

Almost surely, 2^684961443 is an apocalyptic number.

684961443 is a deficient number, since it is larger than the sum of its proper divisors (308081725).

684961443 is a wasteful number, since it uses less digits than its factorization.

684961443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281114 (or 281111 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 684961443 is about 26171.7680526173. The cubic root of 684961443 is about 881.4994421685.

The spelling of 684961443 in words is "six hundred eighty-four million, nine hundred sixty-one thousand, four hundred forty-three".