694243903369 has 27 divisors (see below), whose sum is σ = 720279612423. Its totient is φ = 669143361744.

The previous prime is 694243903357. The next prime is 694243903387. The reversal of 694243903369 is 963309342496.

The square root of 694243903369 is 833213.

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., 500478428025 + 193765475344 = 707445^2 + 440188^2 .

It is not a de Polignac number, because 694243903369 - 2⁵ = 694243903337 is a prime.

It is a super-2 number, since 2×694243903369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (694243903399) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3488662732 + ... + 3488662930.

Almost surely, 2^694243903369 is an apocalyptic number.

694243903369 is the 833213-rd square number.

694243903369 is the 416607-th centered octagonal number.

It is an amenable number.

694243903369 is a deficient number, since it is larger than the sum of its proper divisors (26035709054).

694243903369 is an frugal number, since it uses more digits than its factorization.

694243903369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 58.

It can be divided in two parts, 69424 and 3903369, that added together give a palindrome (3972793).

The spelling of 694243903369 in words is "six hundred ninety-four billion, two hundred forty-three million, nine hundred three thousand, three hundred sixty-nine".