697641 has 16 divisors (see below), whose sum is σ = 1075200. Its totient is φ = 394128.

The previous prime is 697637. The next prime is 697643. The reversal of 697641 is 146796.

It is a happy number.

It is not a de Polignac number, because 697641 - 2² = 697637 is a prime.

It is a Curzon number.

697641 is a lucky number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697641.

It is not an unprimeable number, because it can be changed into a prime (697643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2800 + ... + 3038.

It is an arithmetic number, because the mean of its divisors is an integer number (67200).

2⁶⁹⁷⁶⁴¹ is an apocalyptic number.

It is an amenable number.

697641 is a deficient number, since it is larger than the sum of its proper divisors (377559).

697641 is a wasteful number, since it uses less digits than its factorization.

697641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388.

The product of its digits is 9072, while the sum is 33.

The square root of 697641 is about 835.2490646508. The cubic root of 697641 is about 88.6905467052.

The spelling of 697641 in words is "six hundred ninety-seven thousand, six hundred forty-one".