683443730 has 16 divisors (see below), whose sum is σ = 1230502104. Its totient is φ = 273310080.

The previous prime is 683443729. The next prime is 683443753. The reversal of 683443730 is 37344386.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 428945521 + 254498209 = 20711^2 + 15953^2 .

It is a Curzon number.

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, 62900 + ... + 72960.

Almost surely, 2^683443730 is an apocalyptic number.

683443730 is a deficient number, since it is larger than the sum of its proper divisors (547058374).

683443730 is a wasteful number, since it uses less digits than its factorization.

683443730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16861.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 683443730 is about 26142.7567406347. The cubic root of 683443730 is about 880.8478957570.

The spelling of 683443730 in words is "six hundred eighty-three million, four hundred forty-three thousand, seven hundred thirty".