697855 has 4 divisors (see below), whose sum is σ = 837432. Its totient is φ = 558280.

The previous prime is 697831. The next prime is 697877. The reversal of 697855 is 558796.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 697855 - 2⁷ = 697727 is a prime.

It is a Duffinian number.

697855 is a lucky number.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69781 + ... + 69790.

It is an arithmetic number, because the mean of its divisors is an integer number (209358).

2⁶⁹⁷⁸⁵⁵ is an apocalyptic number.

697855 is a deficient number, since it is larger than the sum of its proper divisors (139577).

697855 is a wasteful number, since it uses less digits than its factorization.

697855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139576.

The product of its digits is 75600, while the sum is 40.

The square root of 697855 is about 835.3771603294. The cubic root of 697855 is about 88.6996143282.

The spelling of 697855 in words is "six hundred ninety-seven thousand, eight hundred fifty-five".