694480609 has 15 divisors (see below), whose sum is σ = 743242083. Its totient is φ = 648916272.

The previous prime is 694480543. The next prime is 694480621. The reversal of 694480609 is 906084496.

The square root of 694480609 is 26353.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 394221025 + 300259584 = 19855^2 + 17328^2 .

It is not a de Polignac number, because 694480609 - 2⁹ = 694480097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (694480679) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9513397 + ... + 9513469.

Almost surely, 2^694480609 is an apocalyptic number.

694480609 is the 26353-rd square number.

694480609 is the 13177-th centered octagonal number.

It is an amenable number.

694480609 is a deficient number, since it is larger than the sum of its proper divisors (48761474).

694480609 is an frugal number, since it uses more digits than its factorization.

694480609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The cubic root of 694480609 is about 885.5641796153.

The spelling of 694480609 in words is "six hundred ninety-four million, four hundred eighty thousand, six hundred nine".