693638 has 16 divisors (see below), whose sum is σ = 1164240. Its totient is φ = 307200.

The previous prime is 693629. The next prime is 693659. The reversal of 693638 is 836396.

It is a super-2 number, since 2×693638² = 962267350088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 693598 and 693607.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 693638.

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, 518 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (72765).

2⁶⁹³⁶³⁸ is an apocalyptic number.

693638 is a deficient number, since it is larger than the sum of its proper divisors (470602).

693638 is a wasteful number, since it uses less digits than its factorization.

693638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its digits is 23328, while the sum is 35.

The square root of 693638 is about 832.8493261089. The cubic root of 693638 is about 88.5205884835.

It can be divided in two parts, 693 and 638, that added together give a palindrome (1331).

The spelling of 693638 in words is "six hundred ninety-three thousand, six hundred thirty-eight".