693439866 has 144 divisors (see below), whose sum is σ = 1863834336. Its totient is φ = 192525984.

The previous prime is 693439853. The next prime is 693439871. The reversal of 693439866 is 668934396.

It is a happy number.

693439866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 880725 + ... + 881511.

It is an arithmetic number, because the mean of its divisors is an integer number (12943294).

Almost surely, 2^693439866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 693439866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931917168).

693439866 is an abundant number, since it is smaller than the sum of its proper divisors (1170394470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

693439866 is a wasteful number, since it uses less digits than its factorization.

693439866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 836 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The square root of 693439866 is about 26333.2464007004. The cubic root of 693439866 is about 885.1215920266.

The spelling of 693439866 in words is "six hundred ninety-three million, four hundred thirty-nine thousand, eight hundred sixty-six".