694503221 has 8 divisors (see below), whose sum is σ = 696943320. Its totient is φ = 692068608.

The previous prime is 694503203. The next prime is 694503263. The reversal of 694503221 is 122305496.

It is a happy number.

694503221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1234321 + 693268900 = 1111^2 + 26330^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 694503221 - 2⁶ = 694503157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694533221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614585 + ... + 615713.

It is an arithmetic number, because the mean of its divisors is an integer number (87117915).

Almost surely, 2^694503221 is an apocalyptic number.

It is an amenable number.

694503221 is a deficient number, since it is larger than the sum of its proper divisors (2440099).

694503221 is a wasteful number, since it uses less digits than its factorization.

694503221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 694503221 is about 26353.4290178717. The cubic root of 694503221 is about 885.5737907115.

The spelling of 694503221 in words is "six hundred ninety-four million, five hundred three thousand, two hundred twenty-one".