693221390 has 8 divisors (see below), whose sum is σ = 1247798520. Its totient is φ = 277288552.

The previous prime is 693221387. The next prime is 693221401. The reversal of 693221390 is 93122396.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 693221390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34661060 + ... + 34661079.

It is an arithmetic number, because the mean of its divisors is an integer number (155974815).

Almost surely, 2^693221390 is an apocalyptic number.

693221390 is a deficient number, since it is larger than the sum of its proper divisors (554577130).

693221390 is a wasteful number, since it uses less digits than its factorization.

693221390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69322146.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 693221390 is about 26329.0977817319. The cubic root of 693221390 is about 885.0286264374.

The spelling of 693221390 in words is "six hundred ninety-three million, two hundred twenty-one thousand, three hundred ninety".