694497321 has 20 divisors (see below), whose sum is σ = 1185668352. Its totient is φ = 396855288.

The previous prime is 694497313. The next prime is 694497337. The reversal of 694497321 is 123794496.

It is a happy number.

It is not a de Polignac number, because 694497321 - 2³ = 694497313 is a prime.

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 not an unprimeable number, because it can be changed into a prime (694497301) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 611865 + ... + 612998.

Almost surely, 2^694497321 is an apocalyptic number.

It is an amenable number.

694497321 is a deficient number, since it is larger than the sum of its proper divisors (491171031).

694497321 is a wasteful number, since it uses less digits than its factorization.

694497321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224882 (or 1224873 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 694497321 is about 26353.3170777418. The cubic root of 694497321 is about 885.5712829717.

The spelling of 694497321 in words is "six hundred ninety-four million, four hundred ninety-seven thousand, three hundred twenty-one".