697638 has 8 divisors (see below), whose sum is σ = 1395288. Its totient is φ = 232544.

The previous prime is 697637. The next prime is 697643. The reversal of 697638 is 836796.

It is a sphenic number, since it is the product of 3 distinct primes.

697638 is an admirable number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 697596 and 697605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58131 + ... + 58142.

It is an arithmetic number, because the mean of its divisors is an integer number (174411).

2⁶⁹⁷⁶³⁸ is an apocalyptic number.

697638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697638 is a wasteful number, since it uses less digits than its factorization.

697638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116278.

The product of its digits is 54432, while the sum is 39.

The square root of 697638 is about 835.2472687773. The cubic root of 697638 is about 88.6904195758.

The spelling of 697638 in words is "six hundred ninety-seven thousand, six hundred thirty-eight".