693812916 has 18 divisors (see below), whose sum is σ = 1753804962. Its totient is φ = 231270960.

The previous prime is 693812909. The next prime is 693812927. The reversal of 693812916 is 619218396.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 424524816 + 269288100 = 20604^2 + 16410^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 9636255 + ... + 9636326.

It is an arithmetic number, because the mean of its divisors is an integer number (97433609).

Almost surely, 2^693812916 is an apocalyptic number.

It is an amenable number.

693812916 is an abundant number, since it is smaller than the sum of its proper divisors (1059992046).

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

693812916 is a wasteful number, since it uses less digits than its factorization.

693812916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19272591 (or 19272586 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 693812916 is about 26340.3286995436. The cubic root of 693812916 is about 885.2802865927.

The spelling of 693812916 in words is "six hundred ninety-three million, eight hundred twelve thousand, nine hundred sixteen".