693353945 has 8 divisors (see below), whose sum is σ = 833105736. Its totient is φ = 553962496.

The previous prime is 693353839. The next prime is 693353957. The reversal of 693353945 is 549353396.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33223696 + 660130249 = 5764^2 + 25693^2 .

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 693353945 - 2¹² = 693349849 is a prime.

It is a Duffinian number.

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 693353945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85832 + ... + 93561.

It is an arithmetic number, because the mean of its divisors is an integer number (104138217).

Almost surely, 2^693353945 is an apocalyptic number.

It is an amenable number.

693353945 is a deficient number, since it is larger than the sum of its proper divisors (139751791).

693353945 is a wasteful number, since it uses less digits than its factorization.

693353945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180171.

The product of its digits is 1312200, while the sum is 47.

The square root of 693353945 is about 26331.6149333838. The cubic root of 693353945 is about 885.0850333778.

The spelling of 693353945 in words is "six hundred ninety-three million, three hundred fifty-three thousand, nine hundred forty-five".